MESON Chess Problem Database
Problem Display
PID: 148124 (1QRr2b1/p6q/2n4r/1Pk1B3/1R1p4/K3N3/B4p2/4N3 w - - 0 1)
Goumondy, Claude
Comm., Die Schwalbe, 1976
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Qxa7#
- 1...Qc2
- 2.Qxa7#
- 1...Qd3+
- 2.Sxd3#
- 1...Qe4
- 2.Qxa7#
- 1...Qf5
- 2.Qxa7#
- 1...Qg6
- 2.Qxa7#
- 1...Qc7
- 2.Sd3#
- 1...Qd7
- 2.Sd3#
- 1...Qe7
- 2.Sd3#
- 1...Qf7
- 2.Sd3#
- 1...Qg7
- 2.Sd3#
- 1...Qh8
- 2.Sd3#
- 2.Qxa7#
- 1...Rh1
- 2.Rxc6#
- 1...Rh2
- 2.Rxc6#
- 1...Rh3
- 2.Rxc6#
- 1...Rh4
- 2.Rxc6#
- 1...Rh5
- 2.Rxc6#
- 1...Re6
- 2.Rc4#
- 1...Rg6
- 2.Sd3#
- 1...Rd5
- 2.Rc4#
- 1...Re8
- 2.Bxd4#
- 1...Rf8
- 2.Bxd4#
- 1...Bc4
- 2.Rxc4#
- 1...Bd5
- 2.Bxd4#
- 1...Be6
- 2.Rxc6#
- 1...Bf7
- 2.Qxa7#
- 1...Qb1
- Tries
- 1.Bd5?
- threat
- 2.Bxd4#
- 2.Rc4#
- 1...Qd3+
- 2.Sxd3#
- 1...Rxd5
- 2.Rc4#
- 1...Rxc8
- 2.Rc4#
- 1...Bxd5
- 2.Bxd4#
- 1...Qb7
- 2.Bxd4#
- 1...f1Q
- 2.Bxd4#
- 1...f1B
- 2.Bxd4#
- 1...Qc2
- 2.Bxd4#
- 2.Qxa7#
- 1...Qe4
- 2.Rc4#
- 2.Qxa7#
- 1...Qc7
- 2.Sd3#
- 2.Rc4#
- 1...Qg7
- 2.Sd3#
- 2.Rc4#
- 1...Qh8
- 2.Sd3#
- 2.Rc4#
- 2.Qxa7#
- 1...Rh4
- 2.Rc4#
- 2.Rxc6#
- 1...d3
- 2.Bd4#
- 2.Rc4#
- 1...dxe3!
- threat
- 1.Be6?
- threat
- 2.Rc4#
- 2.Rxc6#
- 1...Qd3+
- 2.Sxd3#
- 1...Rxe6
- 2.Rc4#
- 1...Rxc8
- 2.Bd6#
- 2.Rc4#
- 1...Bxe6
- 2.Rxc6#
- 1...f1Q
- 2.Rxc6#
- 1...f1B
- 2.Rxc6#
- 1...Qc2
- 2.Rxc6#
- 2.Qxa7#
- 1...Qe4
- 2.Rc4#
- 2.Qxa7#
- 1...Qc7
- 2.Sd3#
- 2.Rc4#
- 1...Qd7
- 2.Sd3#
- 2.Rc4#
- 1...Rd6
- 2.Bxd6#
- 2.Rc4#
- 1...Qb7!
- threat
- 1.Rc7?
- threat
- 2.Qxa7#
- 1...Qd3+
- 2.Sxd3#
- 1...Qxc7
- 2.Sd3#
- 1...a5
- 2.Qa7#
- 1...a6
- 2.Qa7#
- 1...Rxb8!
- threat
- 1.Bd5?
- Keys
- 1.Bf7!
- threat
- 2.Rc4#
- 2.Qxa7#
- 1...Qd3+
- 2.Sxd3#
- 1...Qxf7
- 2.Sd3#
- 1...Rxc8
- 2.Rc4#
- 1...Bxf7
- 2.Qxa7#
- 1...f1Q
- 2.Qxa7#
- 1...f1B
- 2.Qxa7#
- 1...Qc2
- 2.Qxa7#
- 1...Rd7
- 2.Rc4#
- 1...a5
- 2.Rc4#
- 2.Qa7#
- 1...a6
- 2.Rc4#
- 2.Qa7#
- threat
- 1.Bf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 21
- Sets
- Q(g);N_GUARD::QAB(H),XP(f)
- Q(g);CHECK,N_GUARD::S(A),XQ(g)
- Q(g);N_GUARD,N_SPINS(d)::S(A)
- Q(g);N_GUARD::S(A)
- R(e);N_GUARD::R1(I),XS(d)
- R(e);N_GUARD,P_PINS(D)::R1(I),XS(d)
- R(e);S_CUTB(i)::R1(E)
- R(e);S_CUTQ(g)::S(A)
- R(h);S_CUTB(i)::R1(E)
- R(h);N_GUARD::B(G),XP(b)
- B(i);N_GUARD::R1(E),XB(i)
- B(i);S_CUTR(h)::B(G),XP(b)
- B(i);S_CUTR(e)::R1(I),XS(d)
- B(i);S_CUTQ(g)::QAB(H),XP(f)
- Tries
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK,N_GUARD::S(A),XQ(g)
- R(h);XB(B)::R1(E)
- R(h);N_SPINS(d),XR(I)::R1(E)
- B(i);XB(B)::B(G),XP(b)
- Q(g);::B(G),XP(b)
- P(a);::B(G),XP(b)
- Refutation
- P(b);XS(D)
- Try
- B(B);
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK,N_GUARD::S(A),XQ(g)
- R(e);XB(B)::R1(E)
- B(i);XB(B)::R1(I),XS(d)
- P(a);::R1(I),XS(d)
- Refutation
- Q(g);
- Try
- R(I);
- Threat
- QAB(H),XP(f)
- Vars
- Q(g);CHECK,N_GUARD::S(A),XQ(g)
- Q(g);N_GUARD,N_SPINS(d),XR(I)::S(A)
- P(f);::QAB(H)
- Refutation
- R(h);XQ(H)
- Try
- Actual
- B(B);
- Threat
- DUALS(2)
- Vars
- Q(g);CHECK,N_GUARD::S(A),XQ(g)
- Q(g);N_GUARD,XB(B)::S(A)
- R(h);N_SPINS(d),XR(I)::R1(E)
- B(i);XB(B)::QAB(H),XP(f)
- P(a);::QAB(H),XP(f)
- Q(g);::QAB(H),XP(f)
- R(h);::R1(E)
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).