<div class="user_solution">* 1. ... Kf1 2. Sc2 Kg1 3. Sc3 Kf1 4. Se2 Rg1 5. Sxg3#</div><div class="user_solution"><br /></div><div class="user_solution">1. Sc5? Kf1 2. Sd3 Kg1 3. Se2+ Kf1 4. Sxg3+ Kg1 5. Se4 Kf1 6. g4 Kg1 7. Se1 Kf1 8. Sg2 <span id="solP1388365-37" style="background-color: yellow;"></span> <span id="solP1388365-38" style="background-color: transparent;">Rg1?</span> <span id="solP1388365-39" style="background-color: transparent;">9.</span> <span id="solP1388365-40" style="background-color: transparent;">Sg3#</span> <br /><span id="solP1388365-41" style="background-color: transparent;">8.</span> <span id="solP1388365-42" style="background-color: transparent;">...</span> <span id="solP1388365-43" style="background-color: transparent;">Kg1</span> <span id="solP1388365-44" style="background-color: transparent;">9.</span> <span id="solP1388365-45" style="background-color: transparent;">Sg3?</span> <span style="background: transparent none repeat scroll 0% 0%;" id="solP1388365-46">stalemate!</span></div><div class="user_solution">9. Sc3? Kf1 10. Se2 Rg1 11. Sg3# too long!<br /></div><div class="user_solution">2. ... Rg1!</div><div class="user_solution"><br /><div><b><span id="solP1388365-53" style="background-color: transparent;">1.</span> <span id="solP1388365-54" style="background-color: transparent;">Sc2!</span></b> <span id="solP1388365-55" style="background-color: transparent;">Kf1</span> <span id="solP1388365-56" style="background-color: transparent;">2.</span> <span id="solP1388365-57" style="background-color: transparent;">Sxg3+</span> <span id="solP1388365-58" style="background-color: transparent;">Kg1</span><span id="solP1388365-59" style="background-color: transparent;"> 3.</span> <span id="solP1388365-60" style="background-color: transparent;">Se2+?</span> <span id="solP1388365-61" style="background-color: transparent;">Kf1</span> <span id="solP1388365-62" style="background-color: transparent;">4.</span> <span id="solP1388365-63" style="background-color: transparent;">g4</span> <span id="solP1388365-64" style="background-color: transparent;">Rg1</span> <span id="solP1388365-65" style="background-color: transparent;">5.</span> <span id="solP1388365-66" style="background-color: transparent;">Sg3+</span> <span id="solP1388365-67" style="background-color: transparent;">Rxg3+!</span> <br /></div><span id="solP1388365-68" style="background-color: transparent;">3.</span> <span id="solP1388365-69" style="background-color: transparent;">Se4</span> Kf1 <span id="solP1388365-71" style="background-color: transparent;">4.</span> <span id="solP1388365-72" style="background-color: transparent;">g4!</span> <span id="solP1388365-73" style="background-color: transparent;">Rg1?</span> <span id="solP1388365-74" style="background-color: transparent;">5.</span> <span id="solP1388365-75" style="background-color: transparent;">Sd2#</span> <br /><span id="solP1388365-76">4.</span> <span id="solP1388365-77" style="background-color: transparent;">...</span> <span id="solP1388365-78" style="background-color: transparent;">Kg1</span> <span id="solP1388365-79" style="background-color: transparent;">5.</span> <span id="solP1388365-80" style="background-color: transparent;">Se1</span> <span id="solP1388365-81" style="background-color: transparent;">Kf1</span> <span id="solP1388365-82" style="background-color: transparent;">6.</span> <span id="solP1388365-83" style="background-color: transparent;">Sg2</span> <span id="solP1388365-84" style="background-color: transparent;">Kg1</span> <span id="solP1388365-85" style="background-color: transparent;">7.</span> <span id="solP1388365-86" style="background-color: transparent;">Sc3</span> <span id="solP1388365-87" style="background-color: transparent;">Kf1</span> <span id="solP1388365-88" style="background-color: transparent;">8.</span> <span id="solP1388365-89" style="background-color: transparent;">Se2</span> <span id="solP1388365-90" style="background-color: transparent;">Rg1</span> <span id="solP1388365-91" style="background-color: transparent;">9.</span> <span id="solP1388365-92" style="background-color: transparent;">Sg3#</span></div><div class="user_solution"><span id="solP1388365-92" style="background-color: transparent;"><br /></span><div>Keywords: mutate (White to play), complete block (problem), changed mates, changed continuations, exchange of roles (SS), pure round trip (S,S), switchback (k,Sk,Sk), pendulum (k), square vacation, annihilation (bPg3), line opening (unblocking wPg2), tempo move (wP), tempo creation wP, line closing (wSg2), selfblock, meredith<br /></div></div><br />