MESON Chess Problem Database
Problem Display
PID: 251654 (7b/6P1/K6Q/ppRpPB2/r2k4/P1nNNb2/p1RpP1pB/8 w - - 0 1)
Yakolev, YN
Probleemblad, 1982
#2
12 + 11
SOLUTION
- SOUND
- Sets
- 1...Se4
- 2.Rxd5#
- 1...Se4
- Tries
- 1.Sd1?
- threat
- 2.Bg1#
- 2.Qe3#
- 2.e3#
- 1...Bxe2
- 2.Bg1#
- 2.Qe3#
- 1...Sxe2
- 2.Qe3#
- 1...g1Q
- 2.Bxg1#
- 1...g1S
- 2.Bxg1#
- 2.Qe3#
- 2.e3#
- 1...g1B
- 2.Bxg1#
- 1...g1R
- 2.Bxg1#
- 2.Qe3#
- 2.e3#
- 1...Be4
- 2.Bg1#
- 2.Qe3#
- 1...Se4
- 2.Qe3#
- 1...Sxd1!
- threat
- 1.Bg1?
- threat
- 2.Sd1#
- 2.Sf1#
- 2.Sxg2#
- 2.Sc4#
- 2.Sg4#
- 2.Sxd5#
- 1...a1Q
- 2.Sd1#
- 2.Sf1#
- 1...a1R
- 2.Sd1#
- 2.Sf1#
- 1...d1Q
- 2.Sxd1#
- 2.Sf1#
- 1...d1S
- 2.Sxd1#
- 1...d1B
- 2.Sxd1#
- 2.Sf1#
- 2.Sxg2#
- 2.Sc4#
- 2.Sg4#
- 2.Sxd5#
- 1...d1R
- 2.Sxd1#
- 2.Sf1#
- 1...Rc4
- 2.Sd1#
- 2.Sf1#
- 2.Sxg2#
- 2.Sxc4#
- 2.Sg4#
- 2.Sxd5#
- 1...Bg4
- 2.Sd1#
- 2.Sf1#
- 2.Sxg2#
- 2.Sc4#
- 2.Sxg4#
- 2.Sxd5#
- 1...Sd1
- 2.Sxd1#
- 1...Se4
- 2.Rxd5#
- 1...Sxe2!
- threat
- 1.Rc4+?
- 1...bxc4
- 2.Qb6#
- 1...dxc4
- 2.Qb6#
- 1...Rxc4!
- 1...bxc4
- 1.Rxb5?
- threat
- 2.Qb6#
- 1...Se4
- 2.Rxd5#
- 1...Rc4!
- threat
- 1.Rxd5+?
- 1...Bxd5
- 2.Qb6#
- 1...Sxd5!
- 1...Bxd5
- 1.Qf4+?
- 1...Se4
- 2.Rxd5#
- 1...Be4!
- 1...Se4
- 1.Qb6?
- threat
- 2.R5xc3#
- 2.Rc4#
- 2.Rxb5#
- 2.Rxd5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Sxe2
- 2.R5c3#
- 2.R5c4#
- 2.Rxb5#
- 2.Rxd5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Rc4
- 2.Rxc4#
- 2.Rxd5#
- 1...Sb1
- 2.R5c3#
- 2.R5c4#
- 2.Rxb5#
- 2.Rxd5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Sd1
- 2.R5c3#
- 2.R5c4#
- 2.Rxb5#
- 2.Rxd5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Se4
- 2.R5c4#
- 2.Rxd5#
- 1...b4
- 2.R5xc3#
- 2.Rc4#
- 2.Rxa5#
- 2.Rb5#
- 2.Rxd5#
- 2.Rc6#
- 2.Rc7#
- 2.Rc8#
- 1...Kxe3!
- threat
- 1.e6?
- threat
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rxa3
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxe2
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sxe2
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...a1Q
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...a1S
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...a1B
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...a1R
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...d1Q
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...d1S
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...d1B
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...d1R
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...g1Q
- 2.Be5#
- 1...g1S
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...g1B
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...g1R
- 2.Be5#
- 1...Rb4
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Rc4
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Be4
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bg4
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bh5
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sb1
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Sd1
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Se4
- 2.Be5#
- 2.Rxd5#
- 1...b4
- 2.Be5#
- 2.gxh8Q#
- 2.gxh8B#
- 1...Bxg7!
- threat
- 1.Sd1?
- Keys
- 1.Sf4!
- threat
- 2.Se6#
- 1...Kxe3
- 2.Bg1#
- 1...Kxc5
- 2.Qb6#
- 1...Kxe5
- 2.gxh8Q#
- 2.gxh8B#
- threat
- 1.Sf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 1
- Sets
- S(d);N_GUARD,S_CUTB(e)::R1(G),XP(j)
- Tries
- Try
- S(F);
- Threat
- DUALS(3)
- Vars
- S(d);XP(B)::QAB1(K)
- P(c);::B(C),XQ(c)
- P(c);::B(C),XB(c)
- S(d);::QAB1(K)
- Refutation
- S(d);XS(F)
- Try
- B(C);
- Threat
- DUALS(6)
- Vars
- P(b);::B(C)+S(F),XS(b)
- S(d);::B(C)+S(F),XS(d)
- S(d);N_GUARD,S_CUTB(e)::R1(G),XP(j)
- Refutation
- S(d);XP(B)
- Try
- R(G);CHECK
- Vars
- P(i);XR(G)::QAB(K)
- P(j);XR(G)::QAB(K)
- Refutation
- R(f);XR(G)
- Try
- R(G);XP(i)
- Threat
- QAB(K)
- Vars
- S(d);N_GUARD,S_CUTB(e)::R1(G),XP(j)
- Refutation
- R(f);
- Try
- R(G);CHECK,XP(j)
- Vars
- B(e);XR(G)::QAB(K)
- Refutation
- S(d);XR(G)
- Try
- Q(K);CHECK
- Vars
- S(d);P_SPINS(d)::R1(G),XP(j)
- Refutation
- B(e);P_SPINB(e)
- Try
- Q(K);
- Threat
- DUALS(7)
- Refutation
- K(g);S_FLIGHT,XS(F)
- Try
- P(H);
- Threat
- DUALS(3)
- Vars
- P(c);::B(C)
- Refutation
- B(k);XP(L)
- Try
- Actual
- S(E);
- Threat
- S(E)
- Vars
- K(g);OGATEB,S_FLIGHT,XS(F)::B(C)
- K(g);OGATEB,P_SPINS(d),S_FLIGHT,XR(G)::QAB1(K)
- K(g);P_SPINP(j),S_FLIGHT,XP(H)::PXB(k)=Q
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