MESON Chess Problem Database
Problem Display
PID: 69791 (8/1ppQbp2/pPpP2p1/Rn3nR1/KNkP4/2p5/2N1P3/8 w - - 0 1)
Lacny, Ludovit
3rd Prize, Czech Chess Federation, 1956
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Bxg5
- 2.Qxf7#
- 1...Bxd6
- 2.Qxf7#
- 1...Bf6
- 2.Qxf7#
- 1...Bd8
- 2.Qxf7#
- 1...Bf8
- 2.Qxf7#
- 1...Sa3
- 2.Rc5#
- 1...Sbxd4
- 2.Sa3#
- 1...Sbxd6
- 2.Rc5#
- 1...Sa7
- 2.Rc5#
- 1...Se3
- 2.Rc5#
- 1...Sg3
- 2.Rc5#
- 1...Sfxd4
- 2.Se3#
- 1...Sh4
- 2.Rc5#
- 1...Sfxd6
- 2.Rc5#
- 1...Sh6
- 2.Rc5#
- 1...Sg7
- 2.Rc5#
- 1...f6
- 2.Qe6#
- 1...Bxg5
- Tries
- 1.Qxf5?
- threat
- 2.Qd3#
- 2.Qc5#
- 2.Qxf7#
- 1...Bxd6
- 2.Qd3#
- 2.Qxf7#
- 1...Sxd4
- 2.Sa3#
- 2.Se3#
- 2.Rc5#
- 2.Qd3#
- 2.Qc5#
- 1...Sxd6
- 2.Rc5#
- 2.Qd3#
- 2.Qc5#
- 1...cxb6
- 2.Qd3#
- 2.Qxf7#
- 1...cxd6
- 2.Qd3#
- 1...Bf6
- 2.Qd3#
- 2.Qc5#
- 1...c5
- 2.Qd3#
- 2.Qxc5#
- 2.Qd5#
- 2.Qxf7#
- 1...f6
- 2.Qd3#
- 2.Qe6#
- 2.Qc5#
- 1...gxf5!
- threat
- 1.Qe8?
- threat
- 2.Qxf7#
- 1...Sbxd4
- 2.Sa3#
- 1...Sbxd6
- 2.Rc5#
- 1...Sfxd4
- 2.Se3#
- 1...Sfxd6
- 2.Rc5#
- 1...Se3
- 2.Rc5#
- 1...Sh6
- 2.Rc5#
- 1...Sg7
- 2.Rc5#
- 1...f6
- 2.Qf7#
- 2.Qg8#
- 1...cxd6!
- threat
- 1.Qxc7?
- 1...Bxg5
- 2.Qxf7#
- 1...Bxd6
- 2.Qxf7#
- 1...Sbxd4
- 2.Sa3#
- 1...Sbxd6
- 2.Rc5#
- 1...Sxc7
- 2.Rc5#
- 1...Sfxd4
- 2.Se3#
- 1...Sfxd6
- 2.Rc5#
- 1...Bf6
- 2.Qxf7#
- 1...Bd8
- 2.Qxf7#
- 1...Bf8
- 2.Qxf7#
- 1...Sa3
- 2.Rc5#
- 1...Sa7
- 2.Rc5#
- 1...Se3
- 2.Rc5#
- 1...Sg3
- 2.Rc5#
- 1...Sh4
- 2.Rc5#
- 1...Sh6
- 2.Rc5#
- 1...Sg7
- 2.Rc5#
- 1...c5
- 2.Qxc5#
- 1...f6!
- 1...Bxg5
- 1.Qxe7?
- threat
- 2.Qxf7#
- 1...Sbxd4
- 2.Sa3#
- 1...Sbxd6
- 2.Rc5#
- 1...Sfxd4
- 2.Se3#
- 1...Sfxd6
- 2.Rc5#
- 1...Sxe7
- 2.Rc5#
- 1...Se3
- 2.Rc5#
- 1...Sh6
- 2.Rc5#
- 1...Sg7
- 2.Rc5#
- 1...f6
- 2.Qe6#
- 2.Qf7#
- 1...cxd6!
- threat
- 1.bxc7?
- 1...Bxg5
- 2.Qxf7#
- 1...Bxd6
- 2.Qxf7#
- 1...Sbxd4
- 2.Sa3#
- 1...Sbxd6
- 2.Rc5#
- 1...Sxc7
- 2.Rc5#
- 1...Sfxd4
- 2.Se3#
- 1...Sfxd6
- 2.Rc5#
- 1...Bf6
- 2.Qxf7#
- 1...Bd8
- 2.Qxf7#
- 1...Bf8
- 2.Qxf7#
- 1...Sa3
- 2.Rc5#
- 1...Sa7
- 2.Rc5#
- 1...Se3
- 2.Rc5#
- 1...Sg3
- 2.Rc5#
- 1...Sh4
- 2.Rc5#
- 1...Sh6
- 2.Rc5#
- 1...Sg7
- 2.Rc5#
- 1...b6
- 2.Qxc6#
- 1...f6
- 2.Qe6#
- 1...c5!
- 1...Bxg5
- 1.dxe7?
- 1...Sbxd4
- 2.Sa3#
- 1...Sfxd4
- 2.Se3#
- 1...Sxe7
- 2.Se3#
- 2.Rc5#
- 1...Sa3
- 2.Sxa3#
- 2.Rc5#
- 1...Sbd6
- 2.Rc5#
- 1...Sa7
- 2.Sa3#
- 2.Rc5#
- 1...Se3
- 2.Sxe3#
- 2.Rc5#
- 1...Sg3
- 2.Se3#
- 2.Rc5#
- 1...Sh4
- 2.Se3#
- 2.Rc5#
- 1...Sfd6
- 2.Rc5#
- 1...Sh6
- 2.Se3#
- 2.Rc5#
- 1...Sg7
- 2.Se3#
- 2.Rc5#
- 1...c5
- 2.Qd5#
- 1...f6
- 2.Qe6#
- 1...cxb6!
- 1...Sbxd4
- 1.Qxf5?
- Keys
- 1.dxc7!
- 1...Bxb4
- 2.Qxf7#
- 1...Bxg5
- 2.Qxf7#
- 1...Sbxd4
- 2.Sa3#
- 1...Sxc7
- 2.Sa3#
- 1...Sfxd4
- 2.Se3#
- 1...Bc5
- 2.Qxf7#
- 1...Bd6
- 2.Qxf7#
- 1...Bf6
- 2.Qxf7#
- 1...Bd8
- 2.Qxf7#
- 1...Bf8
- 2.Qxf7#
- 1...Sa3
- 2.Sxa3#
- 1...Sbd6
- 2.Rc5#
- 1...Sa7
- 2.Sa3#
- 1...Se3
- 2.Sxe3#
- 1...Sg3
- 2.Se3#
- 1...Sh4
- 2.Se3#
- 1...Sfd6
- 2.Rc5#
- 1...Sh6
- 2.Se3#
- 1...Sg7
- 2.Se3#
- 1...c5
- 2.Qd5#
- 1...f6
- 2.Qe6#
- 1...Bxb4
- 1.dxc7!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 7
- ADDED MATES = 4
- REMOVED MATES = 0
- Sets
- B(j);OGATE,XR(G)::QAB(J),XP(k)
- B(j);OGATE,XP(I)::QAB(J),XP(k)
- B(j);OGATE::QAB(J),XP(k)
- S(c);OGATE::R1(F)
- S(c);N_GUARD,SBLOCK,XP(E)::S(A)
- S(c);OGATE,XP(I)::R1(F)
- S(d);OGATE::R1(G)
- S(d);N_GUARD,SBLOCK,XP(E)::S(A)
- S(d);OGATE,XP(I)::R1(G)
- P(k);N_GUARD::QAB(J)
- Tries
- Try
- Q(J);XS(d)
- Threat
- DUALS(3)
- Vars
- P(i);XP(I)::QAB1(J)
- Refutation
- P(g);XQ(J)
- Try
- Q(J);
- Threat
- QAB(J),XP(k)
- Vars
- S(c);N_GUARD,SBLOCK,XP(E)::S(A)
- S(c);OGATE,XP(I)::R1(F)
- S(d);N_GUARD,SBLOCK,XP(E)::S(A)
- S(d);OGATE,XP(I)::R1(G)
- S(d);OGATE::R1(G)
- Refutation
- P(i);XP(I)
- Try
- Q(J);P_PINP(f),XP(i)
- Vars
- B(j);OGATE,XR(G)::QAB(J),XP(k)
- B(j);OGATE,XP(I)::QAB(J),XP(k)
- S(c);N_GUARD,SBLOCK,XP(E)::S(A)
- S(c);OGATE,XP(I)::R1(F)
- S(c);N_SPINP(f),OGATE,XQ(J)::R1(F)
- S(d);N_GUARD,SBLOCK,XP(E)::S(A)
- S(d);OGATE,XP(I)::R1(G)
- B(j);OGATE::QAB(J),XP(k)
- S(c);OGATE::R1(F)
- S(d);OGATE::R1(G)
- P(f);OGATE::QAR1(J),XP(f)
- Refutation
- P(k);
- Try
- Q(J);XB(j)
- Threat
- QAB(J),XP(k)
- Vars
- S(c);N_GUARD,SBLOCK,XP(E)::S(A)
- S(c);OGATE,XP(I)::R1(F)
- S(d);N_GUARD,SBLOCK,XP(E)::S(A)
- S(d);OGATE,XP(I)::R1(G)
- S(d);OGATE,XQ(J)::R1(G)
- S(d);OGATE::R1(G)
- Refutation
- P(i);XP(I)
- Try
- P(H);XP(i)
- Vars
- B(j);OGATE,XR(G)::QAB(J),XP(k)
- B(j);OGATE,XP(I)::QAB(J),XP(k)
- S(c);N_GUARD,SBLOCK,XP(E)::S(A)
- S(c);OGATE,XP(I)::R1(F)
- S(c);OGATE,XP(H)::R1(F)
- S(d);N_GUARD,SBLOCK,XP(E)::S(A)
- S(d);OGATE,XP(I)::R1(G)
- B(j);OGATE::QAB(J),XP(k)
- S(c);OGATE::R1(F)
- S(d);OGATE::R1(G)
- P(h);N_GUARD::QAR2(J),XP(f)
- P(k);N_GUARD::QAB(J)
- Refutation
- P(f);
- Try
- P(I);XB(j)
- Vars
- S(c);N_GUARD,XP(E)::S(A)
- S(d);N_GUARD,XP(E)::S(A)
- S(c);OGATE::R1(F)
- S(d);OGATE::R1(G)
- P(f);N_GUARD::QAB1(J)
- P(k);N_GUARD::QAB(J)
- Refutation
- P(i);XP(H)
- Try
- Actual
- P(I);XP(i)
- Vars
- B(j);OGATE,XS(D)::QAB(J),XP(k)
- B(j);OGATE,XR(G)::QAB(J),XP(k)
- S(c);N_GUARD,XP(E)::S(A)
- S(c);N_GUARD,XP(I)::S(A)
- S(d);N_GUARD,XP(E)::S(A)
- B(j);OGATE::QAB(J),XP(k)
- S(c);N_GUARD::S(A),XS(c)
- S(c);OGATE::R1(F)
- S(c);N_GUARD::S(A)
- S(d);N_GUARD::S(A),XS(d)
- S(d);N_GUARD::S(A)
- S(d);OGATE::R1(G)
- P(f);N_GUARD::QAB1(J)
- P(k);N_GUARD::QAB(J)
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