MESON Chess Problem Database
Problem Display
PID: 211584 (8/3RR1Pb/1Bnq4/1P1k4/2r3NK/nBP1Q1N1/4r1p1/6b1 w - - 0 1)
Barnes, Barry Peter
Gockel, Hubert
Die Schwalbe, 2019
#2
11 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxd7
- 2.Rxd7#
- 1...Ra2
- 2.Qe6#
- 1...Rb2
- 2.Qe6#
- 1...Rc2
- 2.Qe6#
- 1...Rd2
- 2.Qe6#
- 1...Rf2
- 2.Qc5#
- 2.Qe6#
- 1...Bh2
- 2.Qc5#
- 1...Bb1
- 2.g8Q#
- 2.g8B#
- 1...Bc2
- 2.g8Q#
- 2.g8B#
- 1...Bd3
- 2.g8Q#
- 2.g8B#
- 1...Be4
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Sb4
- 2.Re5#
- 1...Sd4
- 2.Sf6#
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa7
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sd8
- 2.Re5#
- 1...Qxd7
- Tries
- 1.Kh3?
- threat
- 2.Sf6#
- 1...Qxd7
- 2.Rxd7#
- 1...Rf2
- 2.Qc5#
- 2.Qe6#
- 1...Bf5!
- threat
- 1.Kg5?
- threat
- 2.Sf6#
- 1...Qxd7
- 2.Rxd7#
- 1...Rf2
- 2.Qc5#
- 2.Qe6#
- 1...Bxe3+!
- threat
- 1.Kh5?
- threat
- 2.Sf6#
- 1...Qxd7
- 2.Rxd7#
- 1...Rf2
- 2.Qc5#
- 2.Qe6#
- 1...Bg6+!
- threat
- 1.Se4?
- threat
- 2.Sef6#
- 2.Sgf6#
- 2.Rxd6#
- 1...Qxd7
- 2.Sgf6#
- 1...Bxe4
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Sxb5
- 2.Sef6#
- 2.Sgf6#
- 1...Sxe7
- 2.Sef6#
- 2.Rxd6#
- 1...Rf2
- 2.Rxd6#
- 2.Qc5#
- 1...Bh2
- 2.Sef6#
- 2.Sgf6#
- 2.Qc5#
- 1...Bf2+!
- threat
- 1.Sh5?
- threat
- 2.Sf4#
- 2.Sf6#
- 1...Qxd7
- 2.Rxd7#
- 1...Bxe3
- 2.Sf6#
- 1...Rf2
- 2.Qc5#
- 2.Qe6#
- 1...Bh2
- 2.Sf6#
- 2.Qc5#
- 1...Bf2+!
- threat
- 1.Bxc4+?
- 1...Sxc4
- 2.Sf6#
- 1...Kxc4!
- 1...Sxc4
- 1.Re4?
- threat
- 2.Sf6#
- 1...Bxe4
- 2.g8Q#
- 2.g8B#
- 1...Se5
- 2.Rxe5#
- 1...Rf2
- 2.Qc5#
- 1...Qxd7!
- threat
- 1.Qd4+?
- 1...Sxd4
- 2.Sf6#
- 1...Bxd4!
- 1...Sxd4
- 1.Qf4?
- threat
- 2.Sf6#
- 2.Rxd6#
- 2.Qxd6#
- 1...Qxd7
- 2.Sf6#
- 1...Rxe7
- 2.Rxd6#
- 2.Qxd6#
- 1...Bxb6
- 2.Qxd6#
- 1...Sxb5
- 2.Sf6#
- 2.Bxc4#
- 2.Qxc4#
- 1...Sxe7
- 2.Rxd6#
- 2.Qxd6#
- 1...Re5
- 2.Sf6#
- 1...Bd4
- 2.Rxd6#
- 2.Qxd6#
- 1...Bc5
- 2.Sf6#
- 1...Se5
- 2.Sf6#
- 1...Re6!
- threat
- 1.Qd3+?
- 1...Bd4
- 2.Sf6#
- 1...Sd4
- 2.Sf6#
- 1...Bxd3!
- 1...Bd4
- 1.Qf3+?
- 1...Be4
- 2.Sf6#
- 2.Qf7#
- 2.g8Q#
- 2.g8B#
- 1...Re4!
- 1...Be4
- 1.Qe4+?
- 1...Bxe4
- 2.Sf6#
- 2.g8Q#
- 2.g8B#
- 1...Rxe4!
- 1...Bxe4
- 1.g8S?
- threat
- 2.Sf6#
- 1...Qxd7
- 2.Rxd7#
- 1...Rf2
- 2.Qc5#
- 2.Qe6#
- 1...Bxg8!
- threat
- 1.Kh3?
- Keys
- 1.Bd4!
- threat
- 2.Sf6#
- 1...Qxd7
- 2.Rxd7#
- 1...Sxd4
- 2.Re5#
- 1...Rf2
- 2.Qe6#
- threat
- 1.Bd4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 11
- Sets
- Q(h);N_SPINQ(h),OGATE,XR(I)::R(J),XQ(h)
- R(b);N_GUARD::QAB1(C)
- B(a);N_GUARD::QAR1(C)
- B(i);N_GUARD::P=Q
- S(g);N_GUARD::R1(J)
- S(g);N_GUARD::R1(J),XS(g)
- Tries
- Try
- K(F);N_SPINS(E),P-FLIGHT
- Threat
- S(E)
- Vars
- Q(h);N_SPINQ(h),OGATE,P_PINS(E),XR(I)::R(J),XQ(h)
- Refutation
- B(i);P_PINS(E)
- Try
- K(F);N_SPINS(E),S_FLIGHT
- Threat
- S(E)
- Vars
- Q(h);N_SPINQ(h),OGATE,XR(I)::R(J),XQ(h)
- Refutation
- B(a);CHECK,XQ(C)
- Try
- K(F);N_SPINS(E),P-FLIGHT
- Threat
- S(E)
- Vars
- Q(h);N_SPINQ(h),OGATE,XR(I)::R(J),XQ(h)
- Refutation
- B(i);CHECK
- Try
- S(D);N_SPINS(E)
- Threat
- DUALS(3)
- Vars
- Q(h);N_SPINQ(h),XR(I)::S(E)
- Refutation
- B(a);CHECK
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- Q(h);N_SPINQ(h),OGATE,XR(I)::R(J),XQ(h)
- B(a);XQ(C)::S(D)
- Refutation
- B(a);CHECK
- Try
- B(A);CHECK,N_SPINS(E),XR(e)
- Vars
- S(d);SBLOCK,XB(A)::S(E)
- Refutation
- K(f);N_SPINQ(h),S_FLIGHT,XB(A)
- Try
- R(J);N_SPINS(E)
- Threat
- S(E)
- Vars
- B(i);N_GUARD,XR(J)::P=Q
- S(g);N_GUARD::R1(J),XS(g)
- R(b);S_CUTB(a)::QAR1(C)
- Refutation
- Q(h);N_SPINQ(h),XR(I)
- Try
- Q(C);CHECK,N_SPINS(E)
- Vars
- S(g);XQ(C)::S(E)
- Refutation
- B(a);XQ(C)
- Try
- Q(C);N_SPINS(E)
- Threat
- DUALS(3)
- Vars
- Q(h);N_SPINQ(h),XR(I)::S(E)
- B(a);XB(H)::QAR1(C),XQ(h)
- R(b);::S(E)
- B(a);::S(E)
- S(g);::S(E)
- Refutation
- R(b);
- Try
- Q(C);CHECK
- Vars
- B(a);N_PINS(E),P_SPINB(a)::S(E)
- S(g);N_PINS(E),P_SPINS(g)::S(E)
- Refutation
- B(i);XQ(C)
- Try
- Q(C);CHECK
- Refutation
- R(b);
- Try
- Q(C);CHECK,N_SPINS(E)
- Refutation
- R(b);P_PINS(E),XQ(C)
- Try
- P(K);
- Threat
- S(K)
- Vars
- Q(h);N_SPINQ(h),OGATE,XR(I)::R(J),XQ(h)
- Refutation
- B(i);XS(K)
- Try
- Actual
- B(H);N_SPINS(E)
- Threat
- S(E)
- Vars
- Q(h);N_SPINQ(h),OGATE,XR(I)::R(J),XQ(h)
- S(g);N_GUARD,XB(H)::R1(J)
- R(b);N_GUARD::QAB1(C)
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).