MESON Chess Problem Database
Problem Display
PID: 11970 (K7/7B/8/2P1p3/3pNBp1/R1pn1N1p/p1k3qR/Q7 w - - 0 1)
Cheylan, Yves
The Problemist, 1973
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qe2
- 2.Rxe2#
- 1...Se1
- 2.Sxe1#
- 1...Sb2
- 2.Se1#
- 1...Sf2
- 2.Se1#
- 1...Sb4
- 2.Se1#
- 1...Sxf4
- 2.Se1#
- 1...Sxc5
- 2.Se1#
- 1...exf4
- 2.Sxd4#
- 1...Qe2
- Tries
- 1.Sf2?
- threat
- 2.Bxd3#
- 2.Qc1#
- 2.Qxa2#
- 1...Qxf2
- 2.Se1#
- 2.Rxf2#
- 2.Qc1#
- 1...exf4
- 2.Bxd3#
- 1...Qf1
- 2.Qxa2#
- 1...Qh1
- 2.Sxh1#
- 2.Bxd3#
- 2.Qxa2#
- 1...Qg1
- 2.Bxd3#
- 2.Qxa2#
- 1...e4
- 2.Sxd4#
- 1...Qxf3+!
- threat
- 1.Sxc3?
- threat
- 2.Qc1#
- 2.Qxa2#
- 1...dxc3
- 2.Rxc3#
- 2.Qc1#
- 1...Qd2
- 2.Se1#
- 2.Rxd2#
- 1...e4
- 2.Sxd4#
- 1...exf4!
- threat
- 1.Sg3?
- threat
- 2.Qc1#
- 1...Qd2
- 2.Se1#
- 1...e4
- 2.Sxd4#
- 1...exf4!
- threat
- 1.Seg5?
- threat
- 2.Qc1#
- 1...Qd2
- 2.Se1#
- 1...e4
- 2.Sxd4#
- 1...exf4!
- threat
- 1.Sd6?
- threat
- 2.Qc1#
- 1...Qd2
- 2.Se1#
- 1...e4
- 2.Sxd4#
- 1...exf4!
- threat
- 1.Sf6?
- threat
- 2.Qc1#
- 1...Qd2
- 2.Se1#
- 1...e4
- 2.Sxd4#
- 1...exf4!
- threat
- 1.Bg8?
- threat
- 2.Bb3#
- 1...Sxf4
- 2.Se1#
- 1...Sxc5
- 2.Se1#
- 1...Se1
- 2.Sxe1#
- 1...Sb2
- 2.Se1#
- 1...Sf2
- 2.Se1#
- 1...Sb4
- 2.Se1#
- 1...Sc1!
- threat
- 1.Rxg2+?
- 1...Sf2
- 2.Se1#
- 1...hxg2!
- 1...Sf2
- 1.Qd1+?
- 1...Kb2
- 2.Rb3#
- 1...Kxd1!
- 1...Kb2
- 1.Sf2?
- Keys
- 1.Sed2!
- threat
- 2.Rxa2#
- 1...Qxf3+
- 2.Sxf3#
- 1...Qxd2
- 2.Se1#
- 1...cxd2
- 2.Bxd3#
- 1...e4
- 2.Sxd4#
- threat
- 1.Sed2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 8
- Sets
- Q(c);OGATE::R(B),XQ(c)
- S(e);N_GUARD::S(D),XS(e)
- S(e);N_GUARD::S(D)
- S(e);N_GUARD,N_SPINQ(c)::S(D)
- S(e);N_GUARD,XB(F)::S(D)
- S(e);N_GUARD,XP(G)::S(D)
- P(i);N_GUARD,XB(F)::S(D),XP(g)
- Tries
- Try
- S(E);N_PINQ(c),P_PINS(e),P_SPINS(D)
- Threat
- DUALS(3)
- Vars
- P(i);XB(F)::B(H),XS(e)
- Q(c);N_PINS(D)::QAR2(A),XP(a)
- P(i);N_PINS(D),N_SPINS(e)::S(D),XP(g)
- Refutation
- Q(c);CHECK,XS(D)
- Try
- S(E);P_PINS(e),P_SPINS(D),XP(d)
- Threat
- DUALS(2)
- Vars
- P(i);N_PINS(D),N_SPINS(e)::S(D),XP(g)
- Refutation
- P(i);XB(F)
- Try
- S(E);P_PINS(e),P_SPINS(D)
- Threat
- QAR1(A)
- Vars
- Q(c);N_PINS(D)::S(D)
- P(i);N_PINS(D),N_SPINS(e)::S(D),XP(g)
- Refutation
- P(i);XB(F)
- Try
- S(E);P_PINS(e),P_SPINS(D)
- Threat
- QAR1(A)
- Vars
- Q(c);N_PINS(D)::S(D)
- P(i);N_PINS(D),N_SPINS(e)::S(D),XP(g)
- Refutation
- P(i);XB(F)
- Try
- S(E);P_PINS(e),P_SPINS(D)
- Threat
- QAR1(A)
- Vars
- Q(c);N_PINS(D)::S(D)
- P(i);N_PINS(D),N_SPINS(e)::S(D),XP(g)
- Refutation
- P(i);XB(F)
- Try
- S(E);P_PINS(e),P_SPINS(D)
- Threat
- QAR1(A)
- Vars
- Q(c);N_PINS(D)::S(D)
- P(i);N_PINS(D),N_SPINS(e)::S(D),XP(g)
- Refutation
- P(i);XB(F)
- Try
- B(H);
- Threat
- B(H)
- Vars
- S(e);N_GUARD,XB(F)::S(D)
- S(e);N_GUARD,XP(G)::S(D)
- S(e);N_GUARD::S(D),XS(e)
- S(e);N_GUARD::S(D)
- S(e);N_GUARD,N_SPINQ(c)::S(D)
- Refutation
- S(e);
- Try
- R(B);CHECK,XQ(c)
- Vars
- S(e);P_SPINS(e)::S(D)
- Refutation
- P(f);XR(B)
- Try
- Q(A);CHECK
- Vars
- K(b);P-FLIGHT::R1(C)
- Refutation
- K(b);N_SPINQ(c),S_FLIGHT,XQ(A)
- Try
- Actual
- S(E);N_PINQ(c),P_PINS(e),P_SPINS(D)
- Threat
- R(C),XP(a)
- Vars
- Q(c);CHECK,XS(D)::R(B)+S(E),XQ(c)
- Q(c);N_PINS(D),P_SPINQ(c),XS(E)::S(D)
- P(d);XS(E)::B(H),XS(e)
- P(i);N_PINS(D),N_SPINS(e)::S(D),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).