MESON Chess Problem Database
Problem Display
PID: 257975 (1nQ3b1/1K2R1N1/3p1pp1/1pPk1p2/4rP2/1P1Pr3/2N4b/3n2BB w - - 0 1)
Derevchuk, Oleksandr Andrinovich
Permyakov, Evgeni Nikolaevich
3rd HM., Astafyeva-30 JT (Kudesnik), 2021
#2
11 + 12
SOLUTION
- SOUND
- Sets
- 1...Re1
- 2.Sb4#
- 2.Qxg8#
- 1...Re2
- 2.Sb4#
- 2.Qxg8#
- 1...Rxd3
- 2.Sb4#
- 2.Qxg8#
- 1...Rg3
- 2.Sb4#
- 2.Qxg8#
- 1...Rh3
- 2.Sb4#
- 2.Qxg8#
- 1...Sa6
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Sd7
- 2.Qc6#
- 1...g5
- 2.Qxf5#
- 1...Re1
- Tries
- 1.Sh5?
- threat
- 2.Sxf6#
- 1...gxh5
- 2.Qxf5#
- 1...Sc6
- 2.Qxc6#
- 1...Sd7
- 2.Qc6#
- 1...dxc5!
- threat
- 1.Se6?
- threat
- 2.Sb4#
- 1...Bxf4
- 2.Sxf4#
- 1...dxc5
- 2.Qxc5#
- 1...Rf3
- 2.Sc7#
- 1...Sa6
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...b4
- 2.Sxb4#
- 1...Bxe6!
- threat
- 1.Se8?
- threat
- 2.Sxf6#
- 1...Sc6
- 2.Qxc6#
- 1...Sd7
- 2.Qc6#
- 1...dxc5!
- threat
- 1.Bxe3?
- threat
- 2.Sb4#
- 2.Qxg8#
- 1...dxc5
- 2.Qxc5#
- 1...Be6
- 2.Sb4#
- 2.Qxe6#
- 1...Bf7
- 2.Sb4#
- 1...Bh7
- 2.Sb4#
- 2.Qe6#
- 1...Sa6
- 2.Qc6#
- 2.Qxg8#
- 1...Sc6
- 2.Qxc6#
- 2.Qxg8#
- 1...b4
- 2.Sxb4#
- 2.Qxg8#
- 1...Sxe3!
- threat
- 1.Rxe4?
- threat
- 2.Sb4#
- 2.Rxe3#
- 2.Rd4#
- 2.Re5#
- 1...Rxd3
- 2.Sb4#
- 2.Re3#
- 2.Rd4#
- 2.Re5#
- 2.Qxg8#
- 1...Rxe4
- 2.Sb4#
- 2.Qxg8#
- 1...Bxf4
- 2.Sb4#
- 2.Rxe3#
- 1...dxc5
- 2.Rd4#
- 1...Sc6
- 2.Re5#
- 2.Qxc6#
- 1...Re1
- 2.Sb4#
- 2.Rxe1#
- 2.Re2#
- 2.Re3#
- 2.Rd4#
- 2.Re5#
- 2.Qxg8#
- 1...Re2
- 2.Sb4#
- 2.Rxe2#
- 2.Rd4#
- 2.Re5#
- 2.Qxg8#
- 1...Rf3
- 2.Sb4#
- 2.Rd4#
- 2.Qxg8#
- 1...Rg3
- 2.Sb4#
- 2.Rd4#
- 2.Re5#
- 2.Qxg8#
- 1...Rh3
- 2.Sb4#
- 2.Rd4#
- 2.Re5#
- 2.Qxg8#
- 1...Sf2
- 2.Sxe3#
- 2.Sb4#
- 2.Rd4#
- 2.Re5#
- 1...Sc3
- 2.Sxe3#
- 2.Sb4#
- 2.Rd4#
- 2.Re5#
- 1...Sa6
- 2.Rxe3#
- 2.Rd4#
- 2.Re5#
- 2.Qc6#
- 1...b4
- 2.Sxb4#
- 2.Rxe3#
- 2.Rd4#
- 2.Re5#
- 1...fxe4!
- threat
- 1.Rd7?
- threat
- 2.Rxd6#
- 1...Sxd7
- 2.Qc6#
- 1...Sc6
- 2.Qxc6#
- 1...Bxf4!
- threat
- 1.dxe4+?
- 1...Rxe4
- 2.Sb4#
- 2.Qxg8#
- 1...fxe4!
- 1...Rxe4
- 1.d4?
- threat
- 2.Qxg8#
- 1...dxc5
- 2.Qxc5#
- 1...Rf3
- 2.Sb4#
- 1...Be6
- 2.Qxe6#
- 1...Bh7
- 2.Qe6#
- 1...Bf7!
- threat
- 1.Sh5?
- Keys
- 1.Sxf5!
- threat
- 2.Sb4#
- 1...dxc5
- 2.Qxg8#
- 1...gxf5
- 2.Qxf5#
- 1...Sc6
- 2.Qxc6#
- 1...Rf3
- 2.dxe4#
- 1...Sa6
- 2.Qc6#
- 1...b4
- 2.Sxb4#
- threat
- 1.Sxf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 2
- Sets
- S(k);N_GUARD::QAB1(K)
- S(k);N_GUARD::QAB1(K),XS(k)
- P(j);N_GUARD::QAR2(K),XP(g)
- Tries
- Try
- S(J);
- Threat
- S(J),XP(i)
- Vars
- P(j);N_GUARD,XS(J)::QAR2(K),XP(g)
- S(k);N_GUARD::QAB1(K),XS(k)
- S(k);N_GUARD::QAB1(K)
- Refutation
- P(h);XP(G)
- Try
- S(J);
- Threat
- S(C)
- Vars
- B(b);XP(F)::S(J),XB(b)
- P(h);OGATE,XP(G)::QAR1(K),XP(h)
- R(c);N_SPINR(d)::S(J)
- S(k);N_GUARD::QAB1(K)
- S(k);N_GUARD::QAB1(K),XS(k)
- P(e);::S(C),XP(e)
- Refutation
- B(l);XS(J)
- Try
- S(J);
- Threat
- S(J),XP(i)
- Vars
- S(k);N_GUARD::QAB1(K),XS(k)
- S(k);N_GUARD::QAB1(K)
- Refutation
- P(h);XP(G)
- Try
- B(A);XR(c)
- Threat
- DUALS(2)
- Vars
- P(h);OGATE,XP(G)::QAR1(K),XP(h)
- B(l);::S(C)
- Refutation
- S(a);XB(A)
- Try
- R(I);XR(d)
- Threat
- DUALS(4)
- Vars
- P(h);XP(G)::B(B)+R(I),DCHECK
- Refutation
- P(g);P_SPINP(g),XR(I)
- Try
- R(I);P_PINP(h)
- Threat
- R1(I),XP(h)
- Vars
- S(k);N_GUARD,N_SPINP(h),XR(I)::QAB1(K)
- S(k);N_GUARD::QAB1(K),XS(k)
- Refutation
- B(b);XP(F)
- Try
- P(E);CHECK,XR(d)
- Refutation
- P(g);P_SPINP(g),XP(E)
- Try
- P(E);
- Threat
- QAB(K),XB(l)
- Vars
- P(h);OGATE,XP(G)::QAR1(K),XP(h)
- R(c);N_SPINR(d)::S(C)
- B(l);N_GUARD::QAB1(K),XB(l)
- B(l);N_GUARD::QAB1(K)
- Refutation
- B(l);
- Try
- Actual
- S(J);XP(g)
- Threat
- S(C)
- Vars
- P(h);SBLOCK,XP(G)::QAB(K),XB(l)
- P(j);OGATE,XS(J)::QAR2(K),XP(j)
- S(k);N_GUARD::QAB1(K),XS(k)
- R(c);N_GUARD,N_SPINR(d)::P(E),XR(d)
- S(k);N_GUARD::QAB1(K)
- P(e);::S(C),XP(e)
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