MESON Chess Problem Database
Problem Display
PID: 62093 (K2kB1R1/1pN1Np2/3BP3/Q7/p2R4/3r3b/2q5/6r1 w - - 0 1)
Forster, Klaus
Die Schwalbe, 1989
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxc7
- 2.Qxc7#
- 1...Ra1
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Rb1
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Rc1
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Rgd1
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Re1
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Rf1
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Rh1
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Ra3
- 2.Bxa3#
- 2.Bb4#
- 2.Bc5#
- 1...Rb3
- 2.Ba3#
- 2.Bb4#
- 2.Bc5#
- 1...Rc3
- 2.Ba3#
- 2.Bb4#
- 2.Bc5#
- 1...Re3
- 2.Ba3#
- 2.Bb4#
- 2.Bc5#
- 1...Rf3
- 2.Ba3#
- 2.Bb4#
- 2.Bc5#
- 1...Rg3
- 2.Ba3#
- 2.Bb4#
- 2.Bc5#
- 1...Bg2
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Bg4
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Bxe6
- 2.Sxe6#
- 1...fxe6
- 2.Sxe6#
- 1...f5
- 2.Bg6#
- 1...f6
- 2.Bg6#
- 1...Qxc7
- Tries
- 1.Sb5+?
- 1...Qc7
- 2.Qxc7#
- 1...b6!
- 1...Qc7
- 1.Scd5+?
- 1...Qc7
- 2.Bxc7#
- 2.Qxc7#
- 1...b6!
- 1...Qc7
- 1.Sa6+?
- 1...Qc7
- 2.Qxc7#
- 1...b6!
- 1...Qc7
- 1.Sg6?
- threat
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Kc8
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Bxe6
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 1...fxe6
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 1...fxg6
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bxg6#
- 2.Bd7#
- 2.Bf7#
- 1...Qc6
- 2.Bxc6#
- 2.Bd7#
- 1...a3
- 2.Ba4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...b5
- 2.Bxb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...f5
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bf7#
- 1...f6
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bf7#
- 1...Rxg6!
- threat
- 1.Rf8?
- threat
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Bxe6
- 2.Sxe6#
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 1...fxe6
- 2.Sxe6#
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 1...Qc6
- 2.Bxc6#
- 2.Bd7#
- 1...a3
- 2.Ba4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...b5
- 2.Bxb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...f5
- 2.Bxa4#
- 2.Bb5#
- 2.Bh5#
- 2.Bc6#
- 2.Bg6#
- 2.Bd7#
- 2.Bf7#
- 1...f6
- 2.Bxa4#
- 2.Bb5#
- 2.Bh5#
- 2.Bc6#
- 2.Bg6#
- 2.Bd7#
- 2.Bf7#
- 1...Rg8!
- threat
- 1.Qg5?
- threat
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...Bxe6
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 1...fxe6
- 2.Bxa4#
- 2.Bb5#
- 2.Bc6#
- 1...Qc6
- 2.Bxc6#
- 2.Bd7#
- 1...a3
- 2.Ba4#
- 2.Bb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...b5
- 2.Bxb5#
- 2.Bc6#
- 2.Bd7#
- 2.Bxf7#
- 1...f5
- 2.Bxa4#
- 2.Bb5#
- 2.Bh5#
- 2.Bc6#
- 2.Bg6#
- 2.Bd7#
- 2.Bf7#
- 1...f6
- 2.Bxa4#
- 2.Bb5#
- 2.Bh5#
- 2.Bc6#
- 2.Bg6#
- 2.Bd7#
- 2.Bf7#
- 1...Rxg5!
- threat
- 1.exf7?
- threat
- 2.Se6#
- 1...Qxc7
- 2.Qxc7#
- 1...Be6
- 2.Sxe6#
- 1...b6!
- threat
- 1.Sb5+?
- Keys
- 1.Kxb7!
- threat
- 2.Qa8#
- 1...Qb1+
- 2.Sb5#
- 1...Qb3+
- 2.Sb5#
- 1...Qb2+
- 2.Sb5#
- 1...Qg2+
- 2.Scd5#
- 1...Qc6+
- 2.Sxc6#
- 1...Qxc7+
- 2.Qxc7#
- 1...Rb1+
- 2.Bb5#
- 1...Rb3+
- 2.Bb4#
- 1...Bg2+
- 2.Bc6#
- 1...Bxe6
- 2.Sxe6#
- threat
- 1.Kxb7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 8
- REMOVED MATES = 3
- Sets
- Q(b);OGATE,P_SPINQ(b),XS(E)::QAB1(B),XQ(b)
- B(d);XP(D)::QAB(B)+S(E),DCHECK,XB(d)
- P(g);XP(D)::QAB(B)+S(E),DCHECK,XP(g)
- P(g);OGATE::R(I)+B(H)
- Tries
- Try
- S(E);CHECK
- Vars
- Q(b);N_GUARD,P_SPINQ(b)::QAB1(B),XQ(b)
- Refutation
- P(f);P_SPINP(f)
- Try
- S(E);CHECK
- Refutation
- P(f);P_SPINP(f)
- Try
- S(E);CHECK
- Vars
- Q(b);N_GUARD,P_SPINQ(b)::QAB1(B),XQ(b)
- Refutation
- P(f);P_SPINP(f)
- Try
- S(F);
- Threat
- DUALS(5)
- Refutation
- R(a);XS(F)
- Try
- R(I);
- Threat
- DUALS(5)
- Refutation
- R(a);
- Try
- Q(B);
- Threat
- DUALS(5)
- Refutation
- R(a);XQ(B)
- Try
- P(D);XP(g)
- Threat
- QAB(B)+S(E),DCHECK
- Vars
- Q(b);OGATE,P_SPINQ(b),XS(E)::QAB1(B),XQ(b)
- B(d);::QAB(B)+S(E),DCHECK,XB(d)
- Refutation
- P(f);
- Try
- Actual
- K(G);S_FLIGHT,XP(f)
- Threat
- QAR(B)
- Vars
- Q(b);CHECK,N_GUARD::QAB(B)+S(E)
- Q(b);CHECK,N_GUARD::S(F),XQ(b)
- Q(b);CHECK,OGATE,P_SPINQ(b),XS(E)::QAB1(B),XQ(b)
- R(a);CHECK,N_GUARD::R(I)+B(H)
- R(c);CHECK,N_GUARD::R(A)+B(C)
- B(d);CHECK,S_CUTR(a)::R(I)+B(H)
- B(d);XP(D)::QAB(B)+S(E),DCHECK,XB(d)
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