MESON Chess Problem Database
Problem Display
PID: 85573 (7b/3N4/3n3B/3b1Q2/R1qkp2p/NB4pR/1KP2P2/5n2 w - - 0 1)
Petrov, Evgeny Aleksandrovich
Canadian Chess Chat, 1982
#2
10 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qxa4
- 2.Qxd5#
- 1...Qb4
- 2.Qxd5#
- 1...Bc6
- 2.Qc5#
- 1...Be6
- 2.Qc5#
- 1...Bb7
- 2.Qc5#
- 1...Bf7
- 2.Qc5#
- 1...Ba8
- 2.Qc5#
- 1...Bg8
- 2.Qc5#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Bg7
- 2.Bxg7#
- 1...Sd2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se3
- 2.Bxe3#
- 2.fxe3#
- 1...Sb5
- 2.Sxb5#
- 1...Sxf5
- 2.Sb5#
- 1...Sb7
- 2.Sb5#
- 1...Sf7
- 2.Sb5#
- 1...Sc8
- 2.Sb5#
- 1...Se8
- 2.Sb5#
- 1...gxf2
- 2.c3#
- 1...g2
- 2.c3#
- 1...e3
- 2.Qd3#
- 2.c3#
- 1...Qxa4
- Tries
- 1.Ba2?
- 1...Qxa4
- 2.Qxd5#
- 1...Sxf5
- 2.Sb5#
- 1...gxf2
- 2.c3#
- 1...Bc6
- 2.Qc5#
- 1...Be6
- 2.Qc5#
- 1...Bb7
- 2.Qc5#
- 1...Bf7
- 2.Qc5#
- 1...Ba8
- 2.Qc5#
- 1...Bg8
- 2.Qc5#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Bg7
- 2.Bxg7#
- 1...Sd2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se3
- 2.Bxe3#
- 2.fxe3#
- 1...Sb5
- 2.Sxb5#
- 1...Sb7
- 2.Sb5#
- 1...Sf7
- 2.Sb5#
- 1...Sc8
- 2.Sb5#
- 1...Se8
- 2.Sb5#
- 1...g2
- 2.c3#
- 1...e3
- 2.Qd3#
- 2.c3#
- 1...Qb4+!
- 1...Qxa4
- 1.Bxc4?
- threat
- 2.Qxd5#
- 2.c3#
- 1...Bxc4
- 2.Qc5#
- 1...Sxf5
- 2.Sb5#
- 2.c3#
- 1...Bc6
- 2.Qc5#
- 2.c3#
- 1...Be6
- 2.Qc5#
- 2.c3#
- 1...Bb7
- 2.Qc5#
- 2.c3#
- 1...Bf7
- 2.Qc5#
- 2.c3#
- 1...Ba8
- 2.Qc5#
- 2.c3#
- 1...Bg8
- 2.Qc5#
- 2.c3#
- 1...Be5
- 2.Qxe5#
- 2.c3#
- 1...Se3
- 2.Bxe3#
- 2.c3#
- 2.fxe3#
- 1...Sb5
- 2.Sxb5#
- 2.Bxd5#
- 2.Qxd5#
- 1...Sxc4+!
- threat
- 1.Bd2?
- threat
- 2.Bc3#
- 1...Sb5
- 2.Sxb5#
- 1...Sxd2!
- threat
- 1.Bf4?
- 1...Qxa4
- 2.Qxd5#
- 1...Sxf5
- 2.Sb5#
- 1...gxf2
- 2.c3#
- 1...Qb4
- 2.Qxd5#
- 1...Bc6
- 2.Qc5#
- 1...Be6
- 2.Qc5#
- 1...Bb7
- 2.Qc5#
- 1...Bf7
- 2.Qc5#
- 1...Ba8
- 2.Qc5#
- 1...Bg8
- 2.Qc5#
- 1...Be5
- 2.Bxe5#
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Sd2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se3
- 2.Bxe3#
- 2.fxe3#
- 1...Sb5
- 2.Sxb5#
- 1...Sb7
- 2.Sb5#
- 1...Sf7
- 2.Sb5#
- 1...Sc8
- 2.Sb5#
- 1...Se8
- 2.Sb5#
- 1...g2
- 2.c3#
- 1...e3
- 2.Qd3#
- 2.c3#
- 1...Bg7!
- 1...Qxa4
- 1.Bg5?
- 1...Qxa4
- 2.Qxd5#
- 1...Sxf5
- 2.Sb5#
- 1...gxf2
- 2.c3#
- 1...Qb4
- 2.Qxd5#
- 1...Bc6
- 2.Qc5#
- 1...Be6
- 2.Qc5#
- 1...Bb7
- 2.Qc5#
- 1...Bf7
- 2.Qc5#
- 1...Ba8
- 2.Qc5#
- 1...Bg8
- 2.Qc5#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Bxf6#
- 2.Qxf6#
- 1...Sd2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se3
- 2.Bxe3#
- 2.fxe3#
- 1...Sb5
- 2.Sxb5#
- 1...Sb7
- 2.Sb5#
- 1...Sf7
- 2.Sb5#
- 1...Sc8
- 2.Sb5#
- 1...Se8
- 2.Sb5#
- 1...g2
- 2.c3#
- 1...e3
- 2.Qd3#
- 2.c3#
- 1...Bg7!
- 1...Qxa4
- 1.Rxg3?
- threat
- 2.c3#
- 1...Sxg3
- 2.Be3#
- 1...Se3
- 2.Bxe3#
- 2.fxe3#
- 1...Sb5
- 2.Sxb5#
- 1...hxg3!
- threat
- 1.Rxc4+?
- 1...Bxc4
- 2.Qc5#
- 1...Sxc4+!
- 1...Bxc4
- 1.Qg5?
- 1...Qxa4
- 2.Qxd5#
- 1...gxf2
- 2.c3#
- 1...Bg7
- 2.Bxg7#
- 2.Qxg7#
- 1...Qb4
- 2.Qxd5#
- 1...Bc6
- 2.Qc5#
- 1...Be6
- 2.Qc5#
- 1...Bb7
- 2.Qc5#
- 1...Bf7
- 2.Qc5#
- 1...Ba8
- 2.Qc5#
- 1...Bg8
- 2.Qc5#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Sd2
- 2.Qxd2#
- 2.Qe3#
- 1...Sh2
- 2.Qd2#
- 2.Qe3#
- 1...Se3
- 2.Qxe3#
- 2.fxe3#
- 1...Sb5
- 2.Sxb5#
- 1...Sf5
- 2.Sb5#
- 1...Sb7
- 2.Sb5#
- 1...Sf7
- 2.Sb5#
- 1...Sc8
- 2.Sb5#
- 1...Se8
- 2.Sb5#
- 1...g2
- 2.c3#
- 1...e3!
- 1...Qxa4
- 1.Ba2?
- Keys
- 1.Rb4!
- 1...Qxb4
- 2.Qxd5#
- 1...Sxf5
- 2.Sb5#
- 1...gxf2
- 2.c3#
- 1...Bg7
- 2.Bxg7#
- 1...Bc6
- 2.Qc5#
- 1...Be6
- 2.Qc5#
- 1...Bb7
- 2.Qc5#
- 1...Bf7
- 2.Qc5#
- 1...Ba8
- 2.Qc5#
- 1...Bg8
- 2.Qc5#
- 1...Be5
- 2.Qxe5#
- 1...Bf6
- 2.Qxf6#
- 1...Sd2
- 2.Be3#
- 1...Sh2
- 2.Be3#
- 1...Se3
- 2.Bxe3#
- 2.fxe3#
- 1...Sb5
- 2.Sxb5#
- 1...Sb7
- 2.Sb5#
- 1...Sf7
- 2.Sb5#
- 1...Sc8
- 2.Sb5#
- 1...Se8
- 2.Sb5#
- 1...g2
- 2.c3#
- 1...e3
- 2.Qd3#
- 2.c3#
- 1...Qxb4
- 1.Rb4!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 1
- Sets
- Q(c);N_SPINQ(c),XR(G)::QAR1(H),XB(g)
- Q(c);P_PINB(E)::QAR1(H),XB(g)
- B(g);OGATE::QAB1(H)
- B(i);N_GUARD::QAB1(H),XB(i)
- B(i);N_GUARD::QAB(H),XB(i)
- B(i);N_GUARD::B(I),XB(i)
- S(a);N_GUARD::B(I)
- S(h);N_GUARD::S(D),XS(h)
- S(h);N_GUARD,XQ(H)::S(D)
- S(h);N_GUARD::S(D)
- P(b);XP(C)::P(B)
- P(b);::P(B)
- Tries
- Try
- B(E);
- Vars
- Q(c);N_SPINQ(c),XR(G)::QAR1(H),XB(g)
- S(h);N_GUARD,XQ(H)::S(D)
- P(b);XP(C)::P(B)
- B(g);OGATE::QAB1(H)
- B(i);N_GUARD::QAB1(H),XB(i)
- B(i);N_GUARD::QAB(H),XB(i)
- B(i);N_GUARD::B(I),XB(i)
- S(a);N_GUARD::B(I)
- S(h);N_GUARD::S(D),XS(h)
- S(h);N_GUARD::S(D)
- P(b);::P(B)
- Refutation
- Q(c);CHECK
- Try
- B(E);XQ(c)
- Threat
- DUALS(2)
- Vars
- B(g);OGATE,P_SPINB(g),XB(E)::QAB1(H)
- Refutation
- S(h);CHECK,P_SPINS(h),XB(E)
- Try
- B(I);
- Threat
- B(I)
- Vars
- S(h);N_GUARD::S(D),XS(h)
- Refutation
- S(a);XB(I)
- Try
- B(I);
- Vars
- Q(c);N_SPINQ(c),XR(G)::QAR1(H),XB(g)
- S(h);N_GUARD,XQ(H)::S(D)
- P(b);XP(C)::P(B)
- Q(c);P_PINB(E)::QAR1(H),XB(g)
- B(g);OGATE::QAB1(H)
- B(i);N_GUARD::QAB(H),XB(i)
- S(a);N_GUARD::B(I)
- S(h);N_GUARD::S(D),XS(h)
- S(h);N_GUARD::S(D)
- P(b);::P(B)
- Refutation
- B(i);
- Try
- B(I);
- Vars
- Q(c);N_SPINQ(c),XR(G)::QAR1(H),XB(g)
- S(h);N_GUARD,XQ(H)::S(D)
- P(b);XP(C)::P(B)
- Q(c);P_PINB(E)::QAR1(H),XB(g)
- B(g);OGATE::QAB1(H)
- B(i);N_GUARD::QAB1(H),XB(i)
- S(a);N_GUARD::B(I)
- S(h);N_GUARD::S(D),XS(h)
- S(h);N_GUARD::S(D)
- P(b);::P(B)
- Refutation
- B(i);
- Try
- R(F);XP(b)
- Threat
- P(B)
- Vars
- S(a);N_GUARD,XR(F)::B(I)
- S(h);N_GUARD::S(D),XS(h)
- Refutation
- P(f);XR(F)
- Try
- R(G);CHECK,XQ(c)
- Vars
- B(g);OGATE,XR(G)::QAB1(H)
- Refutation
- S(h);CHECK,XR(G)
- Try
- Q(H);
- Vars
- Q(c);N_SPINQ(c),XR(G)::QAR1(H),XB(g)
- P(b);XP(C)::P(B)
- Q(c);P_PINB(E)::QAR1(H),XB(g)
- B(g);OGATE::QAB1(H)
- B(i);N_GUARD::QAB1(H),XB(i)
- B(i);N_GUARD::QAB(H),XB(i)
- S(h);N_GUARD::S(D),XS(h)
- S(h);N_GUARD::S(D)
- P(b);::P(B)
- Refutation
- P(e);
- Try
- Actual
- R(G);
- Vars
- Q(c);N_SPINQ(c),P_PINB(E),XR(G)::QAR1(H),XB(g)
- S(h);N_GUARD,XQ(H)::S(D)
- P(b);XP(C)::P(B)
- B(i);N_GUARD::B(I),XB(i)
- B(g);OGATE::QAB1(H)
- B(i);N_GUARD::QAB1(H),XB(i)
- B(i);N_GUARD::QAB(H),XB(i)
- S(a);N_GUARD::B(I)
- S(h);N_GUARD::S(D),XS(h)
- S(h);N_GUARD::S(D)
- P(b);::P(B)
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).