MESON Chess Problem Database
Problem Display
PID: 244357 (K1N2Q1n/1R6/2n5/2N2P2/P1kP4/Pb5r/1bPPP3/Br4qB w - - 0 1)
Forster, Klaus
Die Schwalbe, 2020
#2
14 + 8
SOLUTION
- SOUND
- Sets
- 1...Qxd4
- 2.Sb6#
- 1...Bc1
- 2.Sb6#
- 2.Sd6#
- 1...Bxa3
- 2.Sd6#
- 1...Bxd4
- 2.Sb6#
- 1...Sb4
- 2.Rxb4#
- 1...Sxd4
- 2.Sb6#
- 2.Rb4#
- 1...Sa5
- 2.Rb4#
- 1...Se5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...Qxd4
- Tries
- 1.Sxb3?
- threat
- 2.Sb6#
- 2.Sd6#
- 2.Qc5#
- 1...Qxh1
- 2.Sb6#
- 2.Qc5#
- 1...Rxh1
- 2.Sb6#
- 2.Qc5#
- 1...Rxb3
- 2.Qc5#
- 1...Bxa3
- 2.Sb6#
- 1...Bxd4
- 2.Sd6#
- 1...Qg2
- 2.Sb6#
- 2.Qc5#
- 1...Rf3
- 2.Sb6#
- 2.Qc5#
- 1...Qh2
- 2.Sb6#
- 2.Qc5#
- 1...Qg3
- 2.Sb6#
- 2.Qc5#
- 1...Qg6
- 2.Sb6#
- 2.Qc5#
- 1...Rh6
- 2.Sb6#
- 2.Qc5#
- 1...Se7
- 2.Sb6#
- 2.Sd6#
- 2.Rb4#
- 1...Sf7
- 2.Sb6#
- 2.Qc5#
- 2.Qxf7#
- 1...Qxd4!
- threat
- 1.Sa6?
- threat
- 2.Qc5#
- 1...Kxd4
- 2.Qc5#
- 1...Bxa3
- 2.Sb6#
- 1...Bxd4
- 2.Sd6#
- 1...Se7
- 2.Rb4#
- 1...Qxd4!
- threat
- 1.Se6?
- threat
- 2.Sb6#
- 2.Sd6#
- 2.Qc5#
- 1...Qxh1
- 2.Sb6#
- 2.Qc5#
- 1...Rxh1
- 2.Sb6#
- 2.Qc5#
- 1...Bxa3
- 2.Sb6#
- 1...Bxd4
- 2.Sd6#
- 1...Bxc2
- 2.Sd6#
- 2.Qc5#
- 1...Bxa4
- 2.Sd6#
- 2.Qc5#
- 1...Qg2
- 2.Sb6#
- 2.Qc5#
- 1...Rf3
- 2.Sb6#
- 2.Qc5#
- 1...Qh2
- 2.Sb6#
- 2.Qc5#
- 1...Qg3
- 2.Sb6#
- 2.Qc5#
- 1...Se7
- 2.Sb6#
- 2.Sd6#
- 2.Rb4#
- 1...Sf7
- 2.Sb6#
- 2.Qc5#
- 1...Qxd4!
- threat
- 1.Sd7?
- threat
- 2.Qc5#
- 1...Kxd4
- 2.Qc5#
- 1...Bxa3
- 2.Sdb6#
- 2.Scb6#
- 1...Bxd4
- 2.Sd6#
- 1...Se7
- 2.Rb4#
- 1...Qxd4!
- threat
- 1.Qd6?
- threat
- 2.Sb6#
- 2.Qd5#
- 1...Qxd4
- 2.Sb6#
- 1...Qxh1
- 2.Sb6#
- 1...Rxh1
- 2.Sb6#
- 2.cxb3#
- 1...Bxa3
- 2.Bd5#
- 2.Qd5#
- 2.Qe6#
- 1...Bxa4
- 2.Qd5#
- 1...Qg2
- 2.Sb6#
- 1...Rf3
- 2.Sb6#
- 1...Sb4
- 2.Sb6#
- 2.Rxb4#
- 1...Se7
- 2.Sb6#
- 2.Rb4#
- 1...Qg8!
- threat
- 1.Qd8?
- threat
- 2.Sb6#
- 2.Qd5#
- 1...Qxh1
- 2.Sb6#
- 1...Rxh1
- 2.Sb6#
- 2.cxb3#
- 1...Bxa3
- 2.Sd6#
- 2.Bd5#
- 2.Qd5#
- 1...Bxd4
- 2.Qd5#
- 1...Bxa4
- 2.Qd5#
- 1...Sxd4
- 2.Qd5#
- 1...Sxd8
- 2.Rb4#
- 1...Qg2
- 2.Sb6#
- 1...Qg8
- 2.Sb6#
- 1...Rf3
- 2.Sb6#
- 1...Sb4
- 2.Sb6#
- 2.Rxb4#
- 1...Se7
- 2.Sb6#
- 2.Rb4#
- 1...Qxd4!
- threat
- 1.cxb3+?
- 1...Kxd4
- 2.Qd6#
- 1...Rxb3!
- 1...Kxd4
- 1.Sxb3?
- Keys
- 1.Sd3!
- threat
- 2.Qc5#
- 1...Kxd4
- 2.Qc5#
- 1...Qxd4
- 2.cxb3#
- 1...Bxa3
- 2.Sb6#
- 1...Bxd4
- 2.Sd6#
- 1...Se7
- 2.Rb4#
- threat
- 1.Sd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 1
- REMOVED MATES = 6
- Sets
- Q(b);SBLOCK,XP(H)::S(M)
- B(c);XP(F)::S(M)
- B(c);XP(H)::S(M)
- S(g);N_GUARD::R1(K),XS(g)
- S(g);N_GUARD::R1(K)
- Tries
- Try
- S(I);XB(d)
- Threat
- DUALS(3)
- Vars
- R(e);XS(I)::QAR1(N)
- B(c);XP(F)::S(M)
- B(c);XP(H)::S(M)
- Refutation
- Q(b);XP(H)
- Try
- S(I);
- Threat
- QAR1(N)
- Vars
- K(f);P-FLIGHT,P_SPINB(c),XP(H)::QAB1(N)
- B(c);XP(F)::S(M)
- B(c);XP(H)::S(M)
- S(g);N_GUARD::R1(K)
- Refutation
- Q(b);XP(H)
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- B(c);XP(F)::S(M)
- B(c);XP(H)::S(M)
- Refutation
- Q(b);XP(H)
- Try
- S(I);
- Threat
- QAR1(N)
- Vars
- K(f);P-FLIGHT,P_SPINB(c),XP(H)::QAB1(N)
- B(c);XP(H)::S(M)
- S(g);N_GUARD::R1(K)
- Refutation
- Q(b);XP(H)
- Try
- Q(N);
- Threat
- DUALS(2)
- Vars
- Q(b);XP(H)::S(M)
- Q(b);XB(B)::S(M)
- B(d);XP(G)::QAB1(N)
- Q(b);::S(M)
- R(e);::S(M)
- Refutation
- Q(b);P_PINS(M)
- Try
- Q(N);
- Threat
- DUALS(2)
- Vars
- Q(b);XB(B)::S(M)
- B(c);XP(H)::QAB1(N)
- B(d);XP(G)::QAB1(N)
- S(g);XP(H)::QAB1(N)
- S(g);N_GUARD,XQ(N)::R1(K)
- Q(b);::S(M)
- R(e);::S(M)
- Refutation
- Q(b);XP(H)
- Try
- P(C);CHECK,XB(d)
- Vars
- K(f);P-FLIGHT,P_SPINB(c),XP(H)::QAR2(N)
- Refutation
- R(e);XP(C)
- Try
- Actual
- S(I);
- Threat
- QAR1(N)
- Vars
- K(f);P-FLIGHT,P_SPINB(c),XP(H)::QAB1(N)
- Q(b);SBLOCK,XP(H)::P(C),XB(d)
- B(c);XP(F)::S(M)
- B(c);XP(H)::S(M)
- S(g);N_GUARD::R1(K)
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