MESON Chess Problem Database
Problem Display
PID: 251793 (1N3Bb1/pPr5/4RPP1/3kpBN1/2n4R/8/QP6/7K w - - 0 1)
Doukhan, Gerard
Loustau, Jean-Marc
Die Schwalbe, 2021
#2
12 + 6
SOLUTION
- SOUND
- Sets
- 1...Rc5
- 2.Rd6#
- 1...Rxb7
- 2.Qxc4#
- 1...Rd7
- 2.Qxc4#
- 1...Re7
- 2.Qxc4#
- 1...Rf7
- 2.Qxc4#
- 1...Rg7
- 2.Qxc4#
- 1...Rh7
- 2.Qxc4#
- 1...Bxe6
- 2.Bxe6#
- 1...Rc5
- Tries
- 1.Se4?
- threat
- 2.Sc3#
- 2.Rd6#
- 1...Bxe6
- 2.Sc3#
- 1...Rc6
- 2.Sc3#
- 1...Rd7
- 2.Sc3#
- 1...Re7
- 2.Rd6#
- 1...Kd4!
- threat
- 1.Sa6?
- threat
- 2.Sb4#
- 2.Sxc7#
- 2.Rd6#
- 1...Rxb7
- 2.Rd6#
- 2.Qxc4#
- 1...Bxe6
- 2.Sb4#
- 1...Rc6
- 2.Sb4#
- 1...Rc5
- 2.Sb4#
- 2.Rd6#
- 1...Rd7
- 2.Sb4#
- 2.Qxc4#
- 1...Re7
- 2.Qxc4#
- 1...Rf7
- 2.Sb4#
- 2.Rd6#
- 2.Qxc4#
- 1...Rg7
- 2.Sb4#
- 2.Rd6#
- 2.Qxc4#
- 1...Rh7
- 2.Sb4#
- 2.Rd6#
- 2.Qxc4#
- 1...Rc8
- 2.Sb4#
- 2.Rd6#
- 1...e4!
- threat
- 1.Sc6?
- threat
- 2.Sb4#
- 2.Be4#
- 2.Qxc4#
- 1...Rxb7
- 2.Be4#
- 2.Qxc4#
- 1...Re7
- 2.Qxc4#
- 1...e4
- 2.Bxe4#
- 1...a5
- 2.Be4#
- 2.Qxc4#
- 1...Rxc6!
- threat
- 1.Sd7?
- threat
- 2.Rd6#
- 1...Rxd7
- 2.Qxc4#
- 1...Rc6
- 2.Rxe5#
- 1...Bxe6!
- threat
- 1.Rxc4?
- threat
- 2.Be4#
- 2.Rd6#
- 1...Rh7+
- 2.Rh4#
- 1...Bxe6
- 2.Be4#
- 2.Bxe6#
- 1...Rc6
- 2.Be4#
- 1...Rd7
- 2.Be4#
- 2.Ra4#
- 2.Rb4#
- 2.Re4#
- 2.Rf4#
- 2.Rg4#
- 2.Rh4#
- 1...Re7
- 2.Be4#
- 1...e4
- 2.Bxe4#
- 1...Rxc4!
- threat
- 1.Rd4+?
- 1...exd4
- 2.Be4#
- 1...Kxd4!
- 1...exd4
- 1.Re4?
- threat
- 2.R6xe5#
- 1...Bxe6
- 2.Bxe6#
- 1...Re7
- 2.Qxc4#
- 1...Rh7+!
- threat
- 1.Qb3?
- threat
- 2.Qd3#
- 1...Re7
- 2.Qxc4#
- 2.Qb5#
- 1...e4!
- threat
- 1.Qa5+?
- 1...Rc5
- 2.Qxc5#
- 1...Sxa5!
- 1...Rc5
- 1.Qxa7?
- threat
- 2.Be4#
- 1...Sxb2
- 2.Rd6#
- 1...Rc5
- 2.Qxc5#
- 1...Sd2
- 2.Rd6#
- 1...Sa3
- 2.Rd6#
- 1...Se3
- 2.Rd6#
- 1...Sa5
- 2.Rd6#
- 1...Sd6
- 2.Rxd6#
- 1...e4
- 2.Bxe4#
- 1...Sb6!
- threat
- 1.Se4?
- Keys
- 1.Sf3!
- threat
- 2.Rxe5#
- 1...Bxe6
- 2.Be4#
- 1...Re7
- 2.Qxc4#
- 1...e4
- 2.Re5#
- threat
- 1.Sf3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 6
- Sets
- R(e);SBLOCK::R1(G)
- R(e);N_GUARD,XP(J)::QAB1(B),XS(a)
- R(e);N_GUARD::QAB1(B),XS(a)
- R(e);N_GUARD,P_PINR(D)::QAB1(B),XS(a)
- B(f);OGATE,XR(G)::B(E),XB(f)
- Tries
- Try
- S(F);
- Threat
- DUALS(2)
- Vars
- B(f);XR(G)::S(F)
- R(e);::S(F)
- R(e);::R1(G)
- Refutation
- K(b);N_SPINS(a),P-FLIGHT
- Try
- S(K);
- Threat
- DUALS(3)
- Vars
- B(f);XR(G)::S(K)
- R(e);::S(K)
- R(e);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(c);
- Try
- S(K);
- Threat
- DUALS(3)
- Vars
- R(e);::QAB1(B),XS(a)
- P(c);::B(E),XP(c)
- Refutation
- R(e);XS(K)
- Try
- S(K);
- Threat
- R1(G)
- Vars
- R(e);N_GUARD,XS(K)::QAB1(B),XS(a)
- R(e);SBLOCK::R1(G),XP(c)
- Refutation
- B(f);XR(G)
- Try
- R(D);XS(a)
- Threat
- DUALS(2)
- Vars
- R(e);CHECK,N_GUARD::QAB(B)+R(D)
- R(e);::B(E)
- P(c);::B(E),XP(c)
- Refutation
- R(e);P_SPINR(e),XR(D)
- Try
- R(D);CHECK
- Vars
- P(c);SBLOCK,XR(D)::B(E)
- Refutation
- K(b);N_SPINS(a),P-FLIGHT,XR(D)
- Try
- R(D);
- Threat
- R1(G),XP(c)
- Vars
- B(f);OGATE,XR(G)::B(E),XB(f)
- R(e);N_GUARD::QAB1(B),XS(a)
- Refutation
- R(e);CHECK
- Try
- Q(B);
- Threat
- QAR2(B)
- Refutation
- P(c);
- Try
- Q(B);CHECK,N_PINS(a)
- Vars
- R(e);N_GUARD,P_SPINR(e)::QAR1(B),XR(e)
- Refutation
- S(a);XQ(B)
- Try
- Q(B);N_PINS(a),XP(d)
- Threat
- B(E)
- Vars
- S(a);N_GUARD,XP(C)::R1(G)
- R(e);N_GUARD::QAR1(B),XR(e)
- S(a);N_GUARD::R1(G)
- S(a);N_GUARD::R1(G),XS(a)
- P(c);::B(E),XP(c)
- Refutation
- S(a);
- Try
- Actual
- S(F);
- Threat
- R1(G),XP(c)
- Vars
- B(f);SBLOCK,XR(G)::B(E)
- R(e);N_GUARD::QAB1(B),XS(a)
- P(c);::R1(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).