MESON Chess Problem Database
Problem Display
PID: 162747 (b3n2b/5pP1/pR1p2N1/3kB1Nn/6Qr/2R4p/2KP2q1/7B w - - 0 1)
Forster, Klaus
Die Schwalbe, 2015
#2
10 + 11
SOLUTION
- SOUND
- Sets
- 1...Qf3
- 2.Bxf3#
- 1...Qe4+
- 2.Bxe4#
- 1...Sf6
- 2.Rxd6#
- 1...Sc7
- 2.Rxd6#
- 1...Sxg7
- 2.Rxd6#
- 1...h2
- 2.Bxg2#
- 1...a5
- 2.Rb5#
- 1...dxe5
- 2.Se7#
- 1...fxg6
- 2.Qe6#
- 1...f5
- 2.g8Q#
- 2.g8B#
- 1...f6
- 2.Qe6#
- 2.g8Q#
- 2.g8B#
- 1...Qf3
- Tries
- 1.Rxa6?
- threat
- 2.Ra5#
- 1...Qe4+
- 2.Bxe4#
- 1...dxe5
- 2.Se7#
- 1...Sc7
- 2.Rxd6#
- 1...Bc6!
- threat
- 1.Qe2?
- threat
- 2.Se7#
- 1...Qe4+
- 2.Qd3#
- 1...dxe5
- 2.Qxe5#
- 1...fxg6
- 2.g8Q#
- 2.g8B#
- 1...Rc4
- 2.Qxc4#
- 1...Re4!
- threat
- 1.Qf3+?
- 1...Re4
- 2.Qxf7#
- 1...Qxf3!
- 1...Re4
- 1.Qf5?
- threat
- 2.Se7#
- 2.Bf6#
- 2.Qxf7#
- 1...Shxg7
- 2.Se7#
- 2.Bxg7#
- 1...Sexg7
- 2.Se7#
- 2.Bxg7#
- 2.Rxd6#
- 1...dxe5
- 2.Qxe5#
- 1...fxg6
- 2.Qe6#
- 2.g8Q#
- 2.g8B#
- 1...Rc4
- 2.Bf6#
- 1...Re4
- 2.Se7#
- 2.Qxf7#
- 1...Rf4
- 2.Se7#
- 1...Sg3
- 2.Se7#
- 2.Qxf7#
- 1...Sf4
- 2.Se7#
- 2.Bf6#
- 1...Shf6
- 2.Se7#
- 2.Bxf6#
- 1...Sef6
- 2.Se7#
- 2.Bxf6#
- 2.Rxd6#
- 1...Sc7
- 2.Se7#
- 2.Bf6#
- 2.Rxd6#
- 1...f6
- 2.Se7#
- 2.Bxf6#
- 2.Qe6#
- 2.g8Q#
- 2.g8B#
- 1...Qe4+!
- threat
- 1.Qxg2+?
- 1...Re4
- 2.Qxe4#
- 1...hxg2!
- 1...Re4
- 1.Qxh4?
- threat
- 2.Qc4#
- 2.Qd4#
- 1...Qe4+
- 2.Bxe4#
- 2.Qxe4#
- 1...dxe5
- 2.Se7#
- 2.Qc4#
- 1...fxg6
- 2.Qd4#
- 1...Sf4!
- threat
- 1.g8S?
- threat
- 2.S8e7#
- 1...Qe4+
- 2.Bxe4#
- 1...fxg6
- 2.Qe6#
- 1...Bf6!
- threat
- 1.Rxa6?
- Keys
- 1.Qc8!
- threat
- 2.Qxa8#
- 1...Qe4+
- 2.Rd3#
- 1...dxe5
- 2.Qc5#
- 1...fxg6
- 2.Qe6#
- 1...Rc4
- 2.Qxc4#
- 1...Bc6
- 2.Qxc6#
- 1...Bb7
- 2.Qxb7#
- 1...Sc7
- 2.Rxd6#
- threat
- 1.Qc8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- Q(a);N_PINP(C),OGATE::B(A),XQ(a)
- Q(a);CHECK,N_PINP(C),OGATE::B(A),XQ(a)
- S(j);N_GUARD::R1(H),XP(g)
- S(j);N_GUARD,XP(J)::R1(H),XP(g)
- P(b);N_GUARD::B(A),XQ(a)
- P(f);N_GUARD::R(H)
- P(g);SBLOCK,XB(F)::S(I)
- P(h);N_GUARD,XS(I)::QAB1(E)
- P(h);::P=Q
- Tries
- Try
- R(H);XP(f)
- Threat
- R(H)
- Vars
- Q(a);CHECK,N_PINP(C),OGATE::B(A),XQ(a)
- P(g);SBLOCK,XB(F)::S(I)
- S(j);N_GUARD::R1(H),XP(g)
- Refutation
- B(i);
- Try
- Q(E);N_SPINP(C)
- Threat
- S(I)
- Vars
- Q(a);CHECK,S_CUTR(c)::QAR2(E)
- P(g);OGATE,XB(F)::QAR1(E),XP(g)
- P(h);XS(I)::P=Q
- R(c);N_GUARD,P_PINR(D)::QAB1(E),XR(c)
- Refutation
- R(c);N_SPINQ(a)
- Try
- Q(E);CHECK,N_PINQ(a)
- Vars
- R(c);P_SPINR(c)::QAB(E),XP(h)
- Refutation
- Q(a);N_PINP(C),P_SPINQ(a),XQ(E)
- Try
- Q(E);
- Threat
- DUALS(3)
- Vars
- P(g);OGATE,P_SPINP(g),XB(F)::QAR1(E),XP(g)
- R(c);P_PINR(D)::QAR(E)+B(F)
- R(c);::S(I)
- Refutation
- Q(a);CHECK,N_PINP(C)
- Try
- Q(E);CHECK,N_SPINP(C),XQ(a)
- Vars
- R(c);N_GUARD,P_SPINR(c)::QAB1(E),XR(c)
- Refutation
- P(b);P_SPINP(b),XQ(E)
- Try
- Q(E);XR(c)
- Threat
- DUALS(2)
- Vars
- P(h);XS(I)::QAR1(E)
- Refutation
- S(e);
- Try
- P(J);
- Threat
- S(J)
- Vars
- Q(a);CHECK,N_PINP(C),OGATE::B(A),XQ(a)
- P(h);N_GUARD,XS(I)::QAB1(E)
- Refutation
- B(k);
- Try
- Actual
- Q(E);
- Threat
- QAB(E),XB(i)
- Vars
- Q(a);CHECK,N_PINP(C),S_CUTR(c)::R(D)
- P(g);N_GUARD,XB(F)::QAR1(E)
- P(h);N_GUARD,XS(I)::QAB1(E)
- R(c);N_GUARD,P_PINR(D)::QAB1(E),XR(c)
- B(i);N_GUARD::QAB1(E),XB(i)
- B(i);N_GUARD::QAB(E),XB(i)
- S(j);N_GUARD::R1(H),XP(g)
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).