MESON Chess Problem Database
Problem Display
PID: 270846 (1NB1NR1B/p1P4K/2R1P3/1P1k4/Qp1ppp1p/b3Pb1q/3n4/8 w - - 0 1)
Doukhan, Gerard
Loustau, Jean-Marc
Shakhmatnaya kompozitsiya, 2021
#2
12 + 11
SOLUTION
- SOUND
- Sets
- 1...Qf1
- 2.Rf5#
- 1...Qg2
- 2.Rf5#
- 1...Qf5+
- 2.Rxf5#
- 1...Qxe6
- 2.Bxe6#
- 1...Qh1
- 2.Rf5#
- 1...Qh2
- 2.Rf5#
- 1...Qg3
- 2.Rf5#
- 1...Sb1
- 2.Qb3#
- 1...Sf1
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...b3
- 2.Qxd4#
- 1...Qf1
- Tries
- 1.Sd7?
- threat
- 2.Sef6#
- 1...Qf5+
- 2.Rxf5#
- 1...Qxe6
- 2.Rc5#
- 1...dxe3!
- threat
- 1.Bxd4?
- threat
- 2.Sf6#
- 2.Rc5#
- 1...Qf5+
- 2.Rxf5#
- 1...Qxe6
- 2.Bxe6#
- 2.Rc5#
- 1...Sb3
- 2.Sf6#
- 2.Qxb3#
- 1...b3
- 2.Sf6#
- 1...fxe3!
- threat
- 1.Rf7?
- threat
- 2.Rd7#
- 1...Qf5+
- 2.Rxf5#
- 1...Qxe6
- 2.Bxe6#
- 1...b3
- 2.Qxd4#
- 1...Sc4!
- threat
- 1.Qc2?
- threat
- 2.Rc5#
- 2.Rd6#
- 2.Qc5#
- 1...Qf5+
- 2.Rxf5#
- 1...Qxe6
- 2.Bxe6#
- 2.Rc5#
- 2.Qc5#
- 1...Sb3
- 2.Rd6#
- 2.Qxb3#
- 2.Qc4#
- 1...Sc4
- 2.Qxc4#
- 1...b3!
- threat
- 1.Qb3+?
- 1...Sc4
- 2.Qxc4#
- 1...Sxb3!
- 1...Sc4
- 1.Qxb4?
- threat
- 2.Rc5#
- 2.Rd6#
- 2.Qxd4#
- 1...Qf5+
- 2.Rxf5#
- 1...Qxe6
- 2.Bxe6#
- 2.Rc5#
- 2.Qxd4#
- 1...dxe3
- 2.Rc5#
- 2.Rd6#
- 2.Qd4#
- 1...Bb2
- 2.Rc5#
- 2.Rd6#
- 2.Qc5#
- 2.Qd6#
- 1...Sb3
- 2.Rd6#
- 2.Qxb3#
- 2.Qc4#
- 1...Sc4
- 2.Rc5#
- 2.Qxc4#
- 1...d3
- 2.Rc5#
- 2.Rd6#
- 2.Qd4#
- 1...Bxb4!
- threat
- 1.Qxa7?
- threat
- 2.Rc5#
- 2.Qxd4#
- 2.Qc5#
- 1...Qf5+
- 2.Rxf5#
- 1...dxe3
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Bb2
- 2.Rc5#
- 2.Qc5#
- 1...b3
- 2.Qxd4#
- 1...d3
- 2.Rc5#
- 2.Qd4#
- 2.Qc5#
- 1...Sb3!
- threat
- 1.exd4?
- threat
- 2.Rc5#
- 1...Qf5+
- 2.Rxf5#
- 1...Sb3
- 2.Qxb3#
- 1...b3
- 2.Sf6#
- 1...e3!
- threat
- 1.exf4?
- threat
- 2.Sf6#
- 1...Qf5+
- 2.Rxf5#
- 1...Qxe6
- 2.Bxe6#
- 1...d3!
- threat
- 1.b6?
- threat
- 2.Qb5#
- 2.Qa5#
- 1...Qf5+
- 2.Rxf5#
- 1...axb6
- 2.Qb5#
- 1...Sb3
- 2.Qxb3#
- 1...Qf1
- 2.Rf5#
- 1...Sc4
- 2.Qb5#
- 1...b3
- 2.Qxd4#
- 1...a5
- 2.Qb5#
- 2.Qxa5#
- 1...a6
- 2.Qa5#
- 1...Be2!
- threat
- 1.Sd7?
- Keys
- 1.Sa6!
- threat
- 2.Rc5#
- 1...Qf5+
- 2.Rxf5#
- 1...Sb3
- 2.Qxb3#
- 1...b3
- 2.Qxd4#
- threat
- 1.Sa6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 8
- Sets
- Q(d);N_GUARD::R(K)
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- Q(d);OGATE,XP(E)::B(I),XQ(d)
- S(a);N_GUARD::QAB(B)
- S(a);N_GUARD::QAB(B),XS(a)
- P(e);OGATE::QAR1(B),XP(f)
- Tries
- Try
- S(H);
- Threat
- S(J)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- Q(d);SBLOCK,XP(E)::R1(D)
- Refutation
- P(f);XP(A)
- Try
- B(L);XP(f)
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- P(e);::S(J)
- Refutation
- P(h);XP(A)
- Try
- R(K);
- Threat
- R(K)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- Q(d);OGATE,XP(E)::B(I),XQ(d)
- P(e);OGATE::QAR1(B),XP(f)
- Refutation
- S(a);
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- S(a);N_GUARD::QAB1(B),XS(a)
- Refutation
- P(e);
- Try
- Q(B);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(B),XS(a)
- Refutation
- S(a);XQ(B)
- Try
- Q(B);XP(e)
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- Refutation
- B(b);XQ(B)
- Try
- Q(B);XP(k)
- Threat
- DUALS(3)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- P(e);::QAR1(B),XP(f)
- Refutation
- S(a);
- Try
- P(A);XP(f)
- Threat
- R1(D)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- S(a);N_GUARD::QAB(B),XS(a)
- P(e);::S(J)
- Refutation
- P(g);
- Try
- P(A);XP(h)
- Threat
- S(J)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- Q(d);OGATE,XP(E)::B(I),XQ(d)
- Refutation
- P(f);
- Try
- P(C);
- Threat
- DUALS(2)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- P(k);XP(C)::QAR2(B)
- S(a);N_GUARD::QAB(B),XS(a)
- Q(d);N_GUARD::R(K)
- S(a);::QAR2(B)
- P(e);OGATE::QAR1(B),XP(f)
- P(k);::QAR(B)
- Refutation
- B(c);
- Try
- Actual
- S(H);
- Threat
- R1(D)
- Vars
- Q(d);CHECK,N_GUARD::R(K),XQ(d)
- S(a);N_GUARD::QAB(B),XS(a)
- P(e);OGATE::QAR1(B),XP(f)
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).