MESON Chess Problem Database
Problem Display
PID: 266427 (1b1r3B/1Npb1R2/5RNn/K2k4/2p5/8/2Qp4/1n5r w - - 0 1)
Doukhan, Gerard
Die Schwalbe, 2022
#2
7 + 10
SOLUTION
- SOUND
- Sets
- 1...Rc8
- 2.Rxd7#
- 1...Re8
- 2.Rxd7#
- 1...Rf8
- 2.Rxd7#
- 1...Rg8
- 2.Rxd7#
- 1...Rxh8
- 2.Rxd7#
- 1...c3
- 2.Qd3#
- 1...Rc8
- Tries
- 1.Sf4+?
- 1...Ke5
- 2.Rf5#
- 2.Re6#
- 1...Kd4!
- 1...Ke5
- 1.Rf4?
- threat
- 2.Qe4#
- 2.Qxc4#
- 1...Kc6
- 2.Qe4#
- 1...Ke6
- 2.Qe4#
- 2.Qxc4#
- 1...Rc1
- 2.Qe4#
- 1...Re1
- 2.Qxc4#
- 1...Re8
- 2.Qxc4#
- 1...Bb5
- 2.Qe4#
- 1...Bf5
- 2.Qxc4#
- 1...Sa3
- 2.Qe4#
- 1...c3
- 2.Qe4#
- 1...c5
- 2.Qe4#
- 1...Sc3!
- threat
- 1.Ra6?
- threat
- 2.Sf4#
- 2.Se7#
- 1...Rxh8
- 2.Rxd7#
- 1...Bc6
- 2.Sf4#
- 1...c3
- 2.Qd3#
- 1...Re1
- 2.Sf4#
- 1...Rf1
- 2.Se7#
- 1...Rh4
- 2.Se7#
- 1...Re8
- 2.Sf4#
- 2.Rxd7#
- 1...Sf5
- 2.Sf4#
- 1...Sg8
- 2.Sf4#
- 1...c5
- 2.Se7#
- 1...c6!
- threat
- 1.Re6?
- threat
- 2.Sf4#
- 2.Qe4#
- 1...Kxe6
- 2.Qxc4#
- 1...Rxh8
- 2.Qe4#
- 1...Bxe6
- 2.Se7#
- 1...c3
- 2.Qb3#
- 2.Qe4#
- 2.Qa2#
- 1...Re1
- 2.Sf4#
- 1...Rf1
- 2.Qe4#
- 1...Sc3
- 2.Sf4#
- 1...c5
- 2.Qe4#
- 1...c6
- 2.Qe4#
- 1...Rh4!
- threat
- 1.Qxd2+?
- 1...Ke4
- 2.Sc5#
- 2.Rf4#
- 1...Sxd2!
- 1...Ke4
- 1.Sf4+?
- Keys
- 1.Rc6!
- threat
- 2.Se7#
- 2.Qxc4#
- 1...Kxc6
- 2.Qe4#
- 1...Rxh8
- 2.Qxc4#
- 1...Bxc6
- 2.Sf4#
- 1...Rc1
- 2.Se7#
- 1...Re1
- 2.Qxc4#
- 1...Rh4
- 2.Se7#
- 1...Re8
- 2.Qxc4#
- 1...Sa3
- 2.Se7#
- 1...Sc3
- 2.Se7#
- 1...Sf5
- 2.Qxc4#
- 1...Sg8
- 2.Qxc4#
- 1...c3
- 2.Se7#
- threat
- 1.Rc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 9
- REMOVED MATES = 3
- Sets
- R(j);N_GUARD::R(F),XB(h)
- R(j);N_GUARD,XB(G)::R(F),XB(h)
- P(d);N_GUARD::QAR2(A)
- Tries
- Try
- S(D);CHECK
- Refutation
- K(e);P-FLIGHT
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- K(e);P_SPINP(d),S_FLIGHT::QAB(A)
- R(b);::QAB1(A)
- R(b);::QAB1(A),XP(d)
- R(j);::QAB1(A),XP(d)
- B(h);::QAB1(A)
- B(h);::QAB1(A),XP(d)
- S(a);::QAB1(A)
- P(d);::QAB1(A)
- P(g);::QAB1(A)
- Refutation
- S(a);
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- R(j);N_GUARD,XB(G)::R(F),XB(h)
- B(h);::S(D)
- P(d);N_GUARD::QAR2(A)
- R(b);::S(D)
- S(f);::S(D)
- P(g);::S(D)
- Refutation
- P(g);
- Try
- R(C);
- Threat
- DUALS(2)
- Vars
- K(e);N_GUARD,S_FLIGHT,XR(C)::QAB(A),XP(d)
- R(j);XB(G)::QAB1(A)
- B(h);SBLOCK,XR(C)::S(D)
- R(b);::S(D)
- R(b);::QAB1(A)
- S(a);::S(D)
- P(g);::QAB1(A)
- Refutation
- R(b);
- Try
- Q(A);CHECK,XP(c)
- Refutation
- S(a);XQ(A)
- Try
- Actual
- R(C);
- Threat
- DUALS(2)
- Vars
- K(e);N_GUARD,P_SPINP(d),S_FLIGHT,XR(C)::QAB(A)
- R(j);XB(G)::QAB1(A),XP(d)
- B(h);SBLOCK,XR(C)::S(D)
- R(b);::S(D)
- R(b);::QAB1(A),XP(d)
- R(j);::QAB1(A),XP(d)
- S(a);::S(D)
- S(f);::QAB1(A),XP(d)
- P(d);::S(D)
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).