MESON Chess Problem Database
Problem Display
PID: 171041 (b7/3B4/3Q1p2/1Rp4p/1b2kp2/2n3PN/3PP3/B1Nn3K w - - 0 1)
Retter, Yosef
2nd HM., Die Schwalbe TT, 1983
#2
10 + 9
| 721 | Variantim | 1990 |
SOLUTION
- SOUND
- Sets
- 1...Bd5
- 2.Qxf4#
- 1...Sb2
- 2.Sf2#
- 1...Sf2+
- 2.Sxf2#
- 1...Se3
- 2.Sf2#
- 2.d3#
- 1...Sb1
- 2.Qd3#
- 2.Qe6#
- 1...Sa2
- 2.Qd3#
- 2.Qe6#
- 1...Sxe2
- 2.Qd3#
- 1...Sa4
- 2.Qd3#
- 2.Qe6#
- 1...Sxb5
- 2.Qd3#
- 2.Qe6#
- 1...Sd5
- 2.Qe6#
- 1...c4
- 2.Bf5#
- 2.Qxf4#
- 1...f5
- 2.Sg5#
- 1...Bd5
- Tries
- 1.Sb3?
- threat
- 2.Qe6#
- 1...Sf2+
- 2.Sxf2#
- 1...Bd5
- 2.Qxf4#
- 1...Sxe2!
- threat
- 1.Bxc3?
- threat
- 2.Qd3#
- 2.Qe6#
- 1...Sf2+
- 2.Sxf2#
- 1...Sxc3
- 2.Sf2#
- 1...Bd5
- 2.Qxf4#
- 1...Sb2
- 2.Sf2#
- 2.Qe6#
- 1...c4
- 2.Bf5#
- 2.Qxf4#
- 2.Qd4#
- 2.Qe6#
- 1...Bxc3!
- threat
- 1.Be6?
- threat
- 2.Qxf4#
- 1...Sf2+
- 2.Sxf2#
- 1...Sxe2
- 2.Qd3#
- 1...fxg3
- 2.Qf4#
- 1...f3
- 2.Qf4#
- 1...Sd5!
- threat
- 1.Rxb4+?
- 1...c4
- 2.Rxc4#
- 1...cxb4!
- 1...c4
- 1.Rxc5?
- threat
- 2.Bf5#
- 2.Rc4#
- 2.Qxf4#
- 2.Qd3#
- 1...Sf2+
- 2.Sxf2#
- 1...Sxe2
- 2.Qd3#
- 1...fxg3
- 2.Bf5#
- 2.Rc4#
- 2.Qf4#
- 2.Qd3#
- 1...Bd5
- 2.Qxf4#
- 1...Sb2
- 2.Sf2#
- 2.Bf5#
- 2.Qxf4#
- 1...Se3
- 2.Sf2#
- 2.Qxf4#
- 2.Qd3#
- 2.d3#
- 1...Sb5
- 2.Bf5#
- 2.Qxf4#
- 2.Qe7#
- 2.Qd3#
- 2.Qe6#
- 1...Sd5
- 2.Rc4#
- 2.Qe6#
- 1...f3
- 2.Bf5#
- 2.Rc4#
- 2.Qf4#
- 2.Qd3#
- 1...f5
- 2.Sg5#
- 2.Bxf5#
- 2.Rc4#
- 2.Re5#
- 2.Qxf4#
- 2.Qe5#
- 2.Qd3#
- 1...Bxc5!
- threat
- 1.Qd4+?
- 1...cxd4
- 2.Bf5#
- 1...Kxd4+!
- 1...cxd4
- 1.gxf4?
- threat
- 2.Qd3#
- 1...Sf2+
- 2.Sxf2#
- 1...Sb2
- 2.Sf2#
- 1...Sd5
- 2.Qe6#
- 1...c4
- 2.Bf5#
- 1...Bd5!
- threat
- 1.g4?
- threat
- 2.Bf5#
- 1...Sf2+
- 2.Sxf2#
- 1...Sxe2
- 2.Qd3#
- 1...Bd5
- 2.Qxf4#
- 1...Se3
- 2.Sf2#
- 2.d3#
- 1...f5
- 2.Sg5#
- 2.Bxf5#
- 1...hxg4!
- threat
- 1.Sb3?
- Keys
- 1.Rb8!
- threat
- 2.Re8#
- 1...Sf2+
- 2.Sxf2#
- 1...Sxe2
- 2.Qd3#
- 1...Bd5
- 2.Qxf4#
- 1...Sd5
- 2.Qe6#
- threat
- 1.Rb8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- B(i);SBLOCK::QAR1(I),XP(e)
- S(a);N_GUARD::S(G)
- S(a);CHECK,N_GUARD::S(G),XS(a)
- S(b);XP(E)::QAB1(I)
- S(b);::QAR2(I)
- P(h);N_GUARD::S(G)
- Tries
- Try
- S(B);
- Threat
- QAR2(I)
- Vars
- S(a);CHECK,N_GUARD::S(G),XS(a)
- B(i);SBLOCK::QAR1(I),XP(e)
- Refutation
- S(b);XP(E)
- Try
- B(A);XS(b)
- Threat
- DUALS(2)
- Vars
- S(a);CHECK,N_GUARD::S(G),XS(a)
- S(a);N_GUARD,XB(A)::S(G)
- B(i);SBLOCK::QAR1(I),XP(e)
- Refutation
- B(c);XB(A)
- Try
- B(J);
- Threat
- QAR1(I),XP(e)
- Vars
- S(a);CHECK,N_GUARD::S(G),XS(a)
- S(b);XP(E)::QAB1(I)
- P(e);XP(F)::QAR1(I)
- P(e);::QAR1(I)
- Refutation
- S(b);
- Try
- R(H);CHECK,XB(c)
- Vars
- P(f);P_SPINP(f)::R(H),XP(f)
- Refutation
- P(f);XR(H)
- Try
- R(H);XP(f)
- Threat
- DUALS(4)
- Vars
- S(a);CHECK,N_GUARD::S(G),XS(a)
- S(b);XP(E)::QAB1(I)
- B(i);::QAR1(I),XP(e)
- Refutation
- B(c);XR(H)
- Try
- Q(I);CHECK
- Vars
- P(f);SBLOCK,XQ(I)::B(J)
- Refutation
- K(d);CHECK,P-FLIGHT,P_SPINS(b),XQ(I)
- Try
- P(F);XP(e)
- Threat
- QAB1(I)
- Vars
- S(a);CHECK,N_GUARD::S(G),XS(a)
- S(a);N_GUARD::S(G)
- S(b);::QAR2(I)
- P(f);::B(J)
- Refutation
- B(i);
- Try
- P(F);
- Threat
- B(J)
- Vars
- S(a);CHECK,N_GUARD::S(G),XS(a)
- S(b);XP(E)::QAB1(I)
- B(i);SBLOCK::QAR1(I),XP(e)
- Refutation
- P(g);XP(F)
- Try
- Actual
- R(H);
- Threat
- R(H)
- Vars
- S(a);CHECK,N_GUARD::S(G),XS(a)
- S(b);XP(E)::QAB1(I)
- B(i);SBLOCK::QAR1(I),XP(e)
- S(b);::QAR2(I)
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