MESON Chess Problem Database
Problem Display
PID: 277040 (7r/2nq1P2/bN1Pk1BR/3R2PP/2Q1PK2/1n3N2/4r3/8 w - - 0 1)
Forster, Klaus
Die Schwalbe, 2024
#2
12 + 7
SOLUTION
- SOUND
- Sets
- 1...Qxd6+
- 2.Re5#
- 1...Qxf7+
- 2.Bf5#
- 1...Rxe4+
- 2.Qxe4#
- 1...Rxh6
- 2.f8S#
- 1...Rh7
- 2.f8S#
- 1...Sa1
- 2.Sd4#
- 1...Sc1
- 2.Sd4#
- 1...Sd2
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa5
- 2.Sd4#
- 1...Sc5
- 2.Sd4#
- 1...Sb5
- 2.Rd1#
- 2.Rd2#
- 2.Rd3#
- 2.Rd4#
- 1...Sxd5+
- 2.Qxd5#
- 1...Qxd6+
- Tries
- 1.Rd1+?
- 1...Sd5+
- 2.Qxd5#
- 1...Bxc4!
- 1...Sd5+
- 1.Rd2+?
- 1...Sd5+
- 2.Qxd5#
- 1...Bxc4!
- 1...Sd5+
- 1.Rd3+?
- 1...Sd5+
- 2.Qxd5#
- 1...Bxc4!
- 1...Sd5+
- 1.Rd4+?
- 1...Sd5+
- 2.Qxd5#
- 1...Bxc4!
- 1...Sd5+
- 1.Rb5+?
- 1...Sd5+
- 2.Qxd5#
- 1...Kxd6!
- 1...Sd5+
- 1.Rf5+?
- 1...Bxc4
- 2.Bh7#
- 2.Rf6#
- 1...Sd5+
- 2.Qxd5#
- 1...Kxd6!
- 1...Bxc4
- 1.Qb4?
- threat
- 2.Re5#
- 1...Qxd6+
- 2.Qxd6#
- 1...Qxf7+
- 2.Bf5#
- 1...Rxe4+
- 2.Qxe4#
- 1...Sxd5+
- 2.exd5#
- 1...Sc5
- 2.Sd4#
- 1...Qb5!
- threat
- 1.Qd4?
- threat
- 2.Re5#
- 2.Qe5#
- 2.Qf6#
- 1...Qxf7+
- 2.Bf5#
- 1...Rxe4+
- 2.Qxe4#
- 1...Sxd5+
- 2.Qxd5#
- 1...Sxd4
- 2.Sxd4#
- 1...Qb5
- 2.Qe5#
- 2.Qf6#
- 1...Qe7
- 2.Re5#
- 2.Qe5#
- 1...Qd8
- 2.Re5#
- 2.Qe5#
- 1...Se8
- 2.Re5#
- 2.Qe5#
- 1...Qxd6+!
- threat
- 1.Qc5?
- threat
- 2.Re5#
- 1...Qxd6+
- 2.Qxd6#
- 1...Qxf7+
- 2.Bf5#
- 1...Sxd5+
- 2.Qxd5#
- 2.exd5#
- 1...Sxc5
- 2.Sd4#
- 1...Rxe4+!
- threat
- 1.f8Q?
- threat
- 2.Bf5#
- 2.Bf7#
- 2.Bh7#
- 2.Re5#
- 2.Qf5#
- 2.Qf6#
- 1...Qxd6+
- 2.Re5#
- 2.Rxd6#
- 2.Qxd6#
- 1...Qf7+
- 2.Bf5#
- 2.Bxf7#
- 2.Qxf7#
- 1...Rxe4+
- 2.Qxe4#
- 1...Sxd5+
- 2.Qxd5#
- 2.exd5#
- 1...Rxh6
- 2.Bf5#
- 2.Re5#
- 2.Qf5#
- 2.Qf6#
- 1...Qe8
- 2.Bf5#
- 2.Bf7#
- 2.Re5#
- 2.Qf5#
- 2.Qf6#
- 1...Qe7
- 2.Bf5#
- 2.Bf7#
- 2.Qxe7#
- 2.Qf5#
- 1...Qg7
- 2.Bf5#
- 2.Bf7#
- 2.Re5#
- 2.Qf5#
- 1...Qh7
- 2.Bf5#
- 2.Bf7#
- 2.Bxh7#
- 2.Re5#
- 2.Qf5#
- 2.Qf6#
- 1...Qd8
- 2.Bf5#
- 2.Bf7#
- 2.Re5#
- 2.Qf5#
- 2.Qf7#
- 1...Rh7
- 2.Bf5#
- 2.Bf7#
- 2.Bxh7#
- 2.Re5#
- 2.Qf5#
- 2.Qf6#
- 1...Rg8
- 2.Bf5#
- 2.Bf7#
- 2.Re5#
- 2.Qf5#
- 2.Qf6#
- 1...Sd4
- 2.Sxd4#
- 2.Bf5#
- 2.Bf7#
- 2.Bh7#
- 2.Re5#
- 2.Qf6#
- 1...Se8
- 2.Bf5#
- 2.Bf7#
- 2.Rb5#
- 2.Re5#
- 2.Qf5#
- 1...Rxf8+!
- threat
- 1.f8R?
- threat
- 2.Bf5#
- 2.Bf7#
- 2.Bh7#
- 2.Rf6#
- 1...Qxd6+
- 2.Re5#
- 1...Qf7+
- 2.Bf5#
- 2.Bxf7#
- 1...Rxe4+
- 2.Qxe4#
- 1...Sxd5+
- 2.Qxd5#
- 1...Rxh6
- 2.Bf5#
- 2.Rf6#
- 1...Qe8
- 2.Bf5#
- 2.Bf7#
- 2.Rf6#
- 1...Qe7
- 2.Bf5#
- 2.Bf7#
- 1...Qg7
- 2.Bf5#
- 2.Bf7#
- 1...Qh7
- 2.Bf5#
- 2.Bf7#
- 2.Bxh7#
- 2.Rf6#
- 1...Qd8
- 2.Bf5#
- 2.Bf7#
- 1...Rh7
- 2.Bf5#
- 2.Bf7#
- 2.Bxh7#
- 2.Rf6#
- 1...Rg8
- 2.Bf5#
- 2.Bf7#
- 2.Rf6#
- 1...Se8
- 2.Bf5#
- 2.Bf7#
- 1...Rxf8+!
- threat
- 1.Rd1+?
- Keys
- 1.Rh7!
- threat
- 2.Bf5#
- 1...Qxd6+
- 2.Re5#
- 1...Qxf7+
- 2.Bxf7#
- 1...Rxe4+
- 2.Qxe4#
- 1...Sxd5+
- 2.Qxd5#
- 1...Rxh7
- 2.f8S#
- 1...Sd4
- 2.Sxd4#
- threat
- 1.Rh7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 6
- Sets
- Q(f);CHECK,SBLOCK,XP(I)::QAB(B)+R(E),DCHECK
- Q(f);CHECK,SBLOCK,XP(L)::R(K)+B(J),DCHECK
- R(a);CHECK,OGATE,XP(C)::QAR2(B),XR(a)
- R(g);N_GUARD,XR(K)::P=S
- R(g);N_GUARD::P=S
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(e);CHECK,OGATE,P_SPINS(e),XR(E)::QAB1(B),XS(e)
- Tries
- Try
- R(E);CHECK
- Vars
- S(e);CHECK,N_GUARD,P_SPINS(e)::QAB1(B),XS(e)
- Refutation
- B(c);XQ(B)
- Try
- R(E);CHECK
- Vars
- S(e);CHECK,N_GUARD,P_SPINS(e)::QAB1(B),XS(e)
- Refutation
- B(c);XQ(B)
- Try
- R(E);CHECK
- Vars
- S(e);CHECK,N_GUARD,P_SPINS(e)::QAB1(B),XS(e)
- Refutation
- B(c);XQ(B)
- Try
- R(E);CHECK
- Vars
- S(e);CHECK,N_GUARD,P_SPINS(e)::QAB1(B),XS(e)
- Refutation
- B(c);XQ(B)
- Try
- R(E);CHECK
- Vars
- S(e);CHECK,N_GUARD,P_SPINS(e)::QAB1(B),XS(e)
- Refutation
- K(d);P-FLIGHT,XP(I)
- Try
- R(E);CHECK
- Vars
- S(e);CHECK,N_GUARD,P_SPINS(e)::QAB1(B),XS(e)
- Refutation
- K(d);P-FLIGHT,XP(I)
- Try
- Q(B);
- Threat
- R1(E)
- Vars
- Q(f);CHECK,OGATE,XP(I)::QAR1(B),XQ(f)
- Q(f);CHECK,SBLOCK,XP(L)::R(K)+B(J),DCHECK
- R(a);CHECK,OGATE,XP(C)::QAR2(B),XR(a)
- S(e);CHECK,OGATE,XR(E)::P(C),XS(e)
- S(b);N_GUARD::S(A)
- Refutation
- Q(f);
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- Q(f);CHECK,SBLOCK,XP(L)::R(K)+B(J),DCHECK
- R(a);CHECK,OGATE,XP(C)::QAR2(B),XR(a)
- S(e);CHECK,OGATE,XR(E)::QAB1(B),XS(e)
- S(b);XQ(B)::S(A),XS(b)
- Refutation
- Q(f);CHECK,XP(I)
- Try
- Q(B);
- Threat
- R1(E)
- Vars
- Q(f);CHECK,OGATE,XP(I)::QAR1(B),XQ(f)
- Q(f);CHECK,SBLOCK,XP(L)::R(K)+B(J),DCHECK
- S(b);N_GUARD,XQ(B)::S(A)
- Refutation
- R(a);CHECK,XP(C)
- Try
- P(L);
- Threat
- DUALS(6)
- Vars
- R(a);CHECK,OGATE,XP(C)::QAR2(B),XR(a)
- Refutation
- R(g);CHECK,XQ(L)
- Try
- P(L);
- Threat
- DUALS(4)
- Vars
- Q(f);CHECK,SBLOCK,XP(I)::QAB(B)+R(E),DCHECK
- R(a);CHECK,OGATE,XP(C)::QAR2(B),XR(a)
- S(e);CHECK,OGATE,P_SPINS(e),XR(E)::QAB1(B),XS(e)
- Refutation
- R(g);CHECK,XR(L)
- Try
- Actual
- R(K);
- Threat
- B(J)
- Vars
- Q(f);CHECK,SBLOCK,XP(I)::QAB(B)+R(E),DCHECK
- Q(f);CHECK,OGATE,XP(L)::B(J),XQ(f)
- R(a);CHECK,OGATE,XP(C)::QAR2(B),XR(a)
- S(e);CHECK,OGATE,P_SPINS(e),XR(E)::QAB1(B),XS(e)
- R(g);N_GUARD,XR(K)::P=S
- S(b);N_GUARD::S(A),XS(b)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).