MESON Chess Problem Database
Problem Display
PID: 90299 (7n/6N1/3pp2N/2nBk1P1/2P2b1r/4PQR1/5PpB/6K1 w - - 0 1)
Kraemer, Wilhelm
Die Schwalbe, 1929
#2
11 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rxh2
- 2.Sg4#
- 2.Qxf4#
- 1...Rh3
- 2.Sg4#
- 2.Qxf4#
- 1...Rg4
- 2.Sxg4#
- 1...Rh5
- 2.Sg4#
- 2.Qxf4#
- 1...Rxh6
- 2.Qxf4#
- 1...Bxe3
- 2.Qf6#
- 1...Bxg3
- 2.Qf6#
- 1...Bxg5
- 2.Rxg5#
- 1...Sb3
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...exd5
- 2.Qxd5#
- 1...Rxh2
- Tries
- 1.Kxg2?
- 1...Rxh6
- 2.Qxf4#
- 1...Bxe3
- 2.Qf6#
- 1...Bxg3
- 2.Qf6#
- 1...Bxg5
- 2.Rxg5#
- 1...exd5
- 2.Qxd5#
- 1...Rh3
- 2.Sg4#
- 2.Qxf4#
- 1...Rg4
- 2.Sxg4#
- 1...Rh5
- 2.Sg4#
- 2.Qxf4#
- 1...Sb3
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Rxh2+!
- 1...Rxh6
- 1.Bc6?
- 1...Rxh2
- 2.Sg4#
- 2.Qxf4#
- 1...Rxh6
- 2.Qxf4#
- 1...Bxe3
- 2.Qf6#
- 1...Bxg3
- 2.Qf6#
- 1...Bxg5
- 2.Rxg5#
- 1...Rg4
- 2.Sxg4#
- 1...Rh3
- 2.Sg4#
- 2.Qxf4#
- 1...Rh5
- 2.Sg4#
- 2.Qxf4#
- 1...Sb3
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...d5!
- 1...Rxh2
- 1.Rxg2?
- 1...Rxh2
- 2.Sg4#
- 2.Qxf4#
- 1...Rxh6
- 2.Bxf4#
- 2.Qxf4#
- 1...exd5
- 2.Qxd5#
- 1...Rg4
- 2.Sxg4#
- 1...Rh3
- 2.Sg4#
- 2.Bxf4#
- 2.Qxf4#
- 1...Rh5
- 2.Sg4#
- 2.Bxf4#
- 2.Qxf4#
- 1...Bg3
- 2.Qf6#
- 1...Sb3
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Bxh2+!
- 1...Rxh2
- 1.Rh3?
- 1...Rxh3
- 2.Sg4#
- 2.Bxf4#
- 2.Qxf4#
- 1...Rxh6
- 2.Bxf4#
- 2.Qxf4#
- 1...exd5
- 2.Qxd5#
- 1...Rg4
- 2.Sxg4#
- 1...Rh5
- 2.Sg4#
- 2.Bxf4#
- 2.Qxf4#
- 1...Bg3
- 2.Qf6#
- 1...Sb3
- 2.Qe4#
- 1...Sd3
- 2.Qe4#
- 1...Sa4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sa6
- 2.Qe4#
- 1...Sb7
- 2.Qe4#
- 1...Sd7
- 2.Qe4#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Bxh2+!
- 1...Rxh3
- 1.Rg4?
- threat
- 2.Bxf4#
- 2.Qxf4#
- 1...Rxh2
- 2.Qxf4#
- 1...Rxg4
- 2.Sxg4#
- 1...Bg3
- 2.Bxg3#
- 2.Qxg3#
- 2.Qf6#
- 1...Sd3
- 2.Qe4#
- 1...Sg6
- 2.Sf7#
- 1...Bxh2+!
- threat
- 1.exf4+?
- 1...Kd4
- 2.Qc3#
- 2.Qe3#
- 1...Rxf4!
- 1...Kd4
- 1.Kxg2?
- Keys
- 1.Qg4!
- 1...Rxh2
- 2.Qxf4#
- 1...Rxg4
- 2.Sxg4#
- 1...Rxh6
- 2.Qxf4#
- 1...Bxe3
- 2.Rxe3#
- 1...Bxg3
- 2.Bxg3#
- 1...Bxg5
- 2.Qxg5#
- 1...exd5
- 2.Qf5#
- 1...Rh3
- 2.Qxf4#
- 1...Rh5
- 2.Qxf4#
- 1...Sb3
- 2.Qxe6#
- 1...Sd3
- 2.Qxe6#
- 1...Sa4
- 2.Qxe6#
- 1...Se4
- 2.Qxe6#
- 1...Sa6
- 2.Qxe6#
- 1...Sb7
- 2.Qxe6#
- 1...Sd7
- 2.Qxe6#
- 1...Sg6
- 2.Sf7#
- 1...Sf7
- 2.Sxf7#
- 1...Rxh2
- 1.Qg4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 11
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(c);N_GUARD::S(J),XR(c)
- R(c);N_GUARD,XS(J)::QAB1(E),XB(b)
- B(b);OGATE,P_PINP(B),XP(D)::QAB1(E)
- B(b);OGATE,P_SPINB(b),XR(F)::QAB1(E)
- B(b);OGATE,XP(I)::B(C)+R(F),DCHECK,XB(b)
- S(d);N_GUARD::QAR1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- S(h);N_GUARD::S(J)
- S(h);N_GUARD::S(J),XS(h)
- P(g);OGATE,XB(H)::QAR1(E),XP(g)
- Tries
- Try
- K(A);P-FLIGHT,XP(a)
- Vars
- R(c);N_GUARD,XS(J)::QAB1(E),XB(b)
- B(b);OGATE,XP(D)::QAB1(E)
- B(b);OGATE,P_SPINB(b),XR(F)::QAB1(E)
- B(b);OGATE,XP(I)::B(C)+R(F),DCHECK,XB(b)
- P(g);OGATE,XB(H)::QAR1(E),XP(g)
- R(c);N_GUARD,P_PINR(F)::S(J),XR(c)
- S(d);N_GUARD::QAR1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- S(h);N_GUARD::S(J)
- S(h);N_GUARD::S(J),XS(h)
- Refutation
- R(c);CHECK,XB(C)
- Try
- B(H);
- Vars
- R(c);N_GUARD,XS(J)::QAB1(E),XB(b)
- B(b);OGATE,P_PINP(B),XP(D)::QAB1(E)
- B(b);OGATE,P_SPINB(b),XR(F)::QAB1(E)
- B(b);OGATE,XP(I)::B(C)+R(F),DCHECK,XB(b)
- R(c);N_GUARD::S(J),XR(c)
- S(d);N_GUARD::QAR1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- S(h);N_GUARD::S(J)
- S(h);N_GUARD::S(J),XS(h)
- Refutation
- P(f);
- Try
- R(F);P_PINB(b),XP(a)
- Vars
- P(g);OGATE,XB(H)::QAR1(E),XP(g)
- R(c);N_GUARD,P_PINR(F)::S(J),XR(c)
- B(b);OGATE::QAB1(E)
- S(d);N_GUARD::QAR1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- S(h);N_GUARD::S(J)
- S(h);N_GUARD::S(J),XS(h)
- Refutation
- B(b);CHECK,N_SPINB(b),XB(C)
- Try
- R(F);P_PINB(b)
- Vars
- P(g);OGATE,XB(H)::QAR1(E),XP(g)
- R(c);N_GUARD::S(J),XR(c)
- B(b);OGATE::QAB1(E)
- S(d);N_GUARD::QAR1(E)
- S(d);N_GUARD::QAR1(E),XS(d)
- S(h);N_GUARD::S(J)
- S(h);N_GUARD::S(J),XS(h)
- Refutation
- B(b);CHECK,N_SPINB(b),XB(C)
- Try
- R(F);P_PINB(b)
- Threat
- DUALS(2)
- Vars
- R(c);N_SPINB(b),XB(C)::QAB1(E),XB(b)
- R(c);XR(F)::S(J),XR(c)
- S(d);N_GUARD::QAR1(E)
- S(h);N_GUARD::S(J)
- Refutation
- B(b);CHECK,N_SPINB(b),XB(C)
- Try
- P(D);CHECK,XB(b)
- Refutation
- R(c);XP(D)
- Try
- Actual
- Q(E);
- Vars
- R(c);N_GUARD,XB(C)::QAB1(E),XB(b)
- R(c);XQ(E)::S(J),XR(c)
- R(c);N_GUARD,XS(J)::QAB1(E),XB(b)
- B(b);OGATE,P_PINP(B),XP(D)::B(C)+R(F),DCHECK,XB(b)
- B(b);OGATE,P_SPINB(b),XR(F)::B(C),XB(b)
- B(b);OGATE,XP(I)::QAR2(E),XB(b)
- P(g);N_GUARD,XB(H)::QAR1(E)
- R(c);N_GUARD::QAB1(E),XB(b)
- S(d);N_GUARD::QAR1(E),XP(g)
- S(h);N_GUARD::S(J)
- S(h);N_GUARD::S(J),XS(h)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).