MESON Chess Problem Database
Problem Display
PID: 248859 (2N4R/KPk5/4Pp2/P1N3B1/3P4/2qb4/1r6/2RBr2Q w - - 0 1)
Grolman, Lev
Zadachi i Etyudi, 2003
#2
12 + 6
SOLUTION
- SOUND
- Sets
- 1...Qd2
- 2.Sa6#
- 1...Qb4
- 2.Sa6#
- 1...Qxa5+
- 2.Sa6#
- 1...Qa3
- 2.Sa6#
- 1...Qb3
- 2.Sa6#
- 1...Qc4
- 2.Sa6#
- 1...Qxc5+
- 2.Rxc5#
- 1...Rxd1
- 2.Bf4#
- 1...Rg1
- 2.Bf4#
- 1...Ra2
- 2.b8Q#
- 2.b8B#
- 1...Rc2
- 2.b8Q#
- 2.b8B#
- 1...Rd2
- 2.b8Q#
- 2.b8B#
- 1...Re2
- 2.b8Q#
- 2.b8B#
- 1...Rf2
- 2.b8Q#
- 2.b8B#
- 1...Rh2
- 2.b8Q#
- 2.b8B#
- 1...Rb5
- 2.Sa6#
- 1...Rb6
- 2.axb6#
- 1...Rxb7+
- 2.Qxb7#
- 1...Bb1
- 2.Sa6#
- 1...Bc2
- 2.Sa6#
- 1...Be2
- 2.Bf4#
- 1...Bb5
- 2.b8Q#
- 2.b8B#
- 1...Bf5
- 2.Sa6#
- 1...Ba6
- 2.Sxa6#
- 1...Bg6
- 2.Sa6#
- 1...Bh7
- 2.Sa6#
- 1...f5
- 2.Bd8#
- 2.Rh7#
- 1...Qd2
- Tries
- 1.Rxc3?
- threat
- 2.Sxd3#
- 2.Sa6#
- 1...Rxb7+
- 2.Qxb7#
- 1...Be4
- 2.Sxe4#
- 2.Sa6#
- 1...Re5
- 2.Sa6#
- 1...Rc2
- 2.Sa6#
- 2.b8Q#
- 2.b8B#
- 1...Rb3
- 2.Sa6#
- 1...Rb4
- 2.Sa6#
- 1...Rb5
- 2.Sa6#
- 1...Rb6
- 2.Sa6#
- 2.axb6#
- 1...Bb1
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Sd7#
- 1...Bf1
- 2.Sd3#
- 2.Sa6#
- 1...Bc2
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Sd7#
- 1...Be2
- 2.Sd3#
- 2.Sa6#
- 2.Bf4#
- 1...Bc4
- 2.Sa6#
- 1...Bb5
- 2.Sa6#
- 2.b8Q#
- 2.b8B#
- 1...Bf5
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Sd7#
- 1...Ba6
- 2.Sxa6#
- 1...Bg6
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Sd7#
- 1...Bh7
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Sd7#
- 1...Rxe6!
- threat
- 1.Qd5?
- threat
- 2.Qd6#
- 2.Qd7#
- 1...Qxa5+
- 2.Sa6#
- 1...Qxc5+
- 2.Rxc5#
- 2.Qxc5#
- 1...Rxb7+
- 2.Qxb7#
- 1...Rxe6
- 2.Sxe6#
- 2.Qd7#
- 1...Rb6
- 2.Qd7#
- 2.axb6#
- 1...Bb5
- 2.Qd6#
- 2.b8Q#
- 2.b8B#
- 1...Qxd4!
- threat
- 1.Qh7+?
- 1...Kc6
- 2.Qd7#
- 1...Bxh7!
- 1...Kc6
- 1.Rxc3?
- Keys
- 1.Ba4!
- threat
- 2.Qc6#
- 1...Qxa5+
- 2.Sa6#
- 1...Qxc5+
- 2.Rxc5#
- 1...Rxb7+
- 2.Qxb7#
- 1...Rxh1
- 2.Bf4#
- 1...Rxe6
- 2.Sxe6#
- 1...Re4
- 2.Qh7#
- 1...Rg2
- 2.b8Q#
- 2.b8B#
- 1...Rb5
- 2.Sa6#
- 1...Rb6
- 2.axb6#
- 1...Be4
- 2.Sa6#
- 2.Bf4#
- 1...Bb5
- 2.b8Q#
- 2.b8B#
- threat
- 1.Ba4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 14
- Sets
- Q(c);::R(A)+S(F),DCHECK
- Q(c);CHECK,XP(E)::R(A)+S(F),DCHECK
- Q(c);P_PINP(E)::R(A)+S(F),DCHECK
- Q(c);S_CUTB(d)::S(F)
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::R(A),XQ(c)
- R(a);N_GUARD,XB(B)::B(G)
- R(a);N_GUARD::B(G)
- R(b);N_GUARD,P_PINP(E)::P=Q
- R(b);N_GUARD::P=Q
- R(b);S_CUTB(d)::S(F)
- R(b);OGATE::P(E),XR(b)
- R(b);CHECK,OGATE,XP(J)::QAR1(C),XR(b)
- B(d);N_GUARD::S(F)
- B(d);S_CUTR(a)::B(G)
- B(d);S_CUTR(b)::P=Q
- B(d);N_GUARD::S(F),XB(d)
- Tries
- Try
- R(A);XQ(c)
- Threat
- DUALS(2)
- Vars
- R(b);CHECK,OGATE,XP(J)::QAR1(C),XR(b)
- R(a);::R(A)+S(F),DCHECK
- R(b);::R(A)+S(F),DCHECK
- B(d);::S(F)
- B(d);::R(A)+S(F),DCHECK,XB(d)
- Refutation
- R(a);XP(H)
- Try
- Q(C);
- Threat
- DUALS(2)
- Vars
- Q(c);CHECK,XP(E)::R(A)+S(F),DCHECK
- R(b);CHECK,OGATE,XP(J)::QAR1(C),XR(b)
- Refutation
- Q(c);P_PINS(F),XP(D)
- Try
- Q(C);CHECK
- Vars
- K(f);P-FLIGHT::QAB1(C)
- Refutation
- B(d);XQ(C)
- Try
- Actual
- B(B);
- Threat
- QAR1(C)
- Vars
- Q(c);CHECK,XP(E)::R(A)+S(F),DCHECK
- Q(c);CHECK,OGATE,P_SPINQ(c),XS(F)::R(A),XQ(c)
- R(b);CHECK,OGATE,XP(J)::QAR1(C),XR(b)
- R(a);N_GUARD,XQ(C)::B(G)
- R(a);XP(H)::S(F),XR(a)
- R(a);S_CUTB(d)::QAR(C)
- R(b);N_GUARD::P=Q
- R(b);S_CUTB(d)::S(F)
- R(b);OGATE::P(E),XR(b)
- B(d);S_CUTR(b)::P=Q
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).