MESON Chess Problem Database
Problem Display
PID: 64003 (2R5/pn1p2B1/2nP2R1/3k4/N3q1N1/1P6/3b2B1/K5Q1 w - - 0 1)
Widdows, TH
Chess, 1946
#2
10 + 7
SOLUTION
- SOUND
- Sets
- 1...Qxg2
- 2.Qxg2#
- 1...Qf3
- 2.Bxf3#
- 1...Bc1
- 2.Sc3#
- 1...Be1
- 2.Se3#
- 1...Bc3+
- 2.Sxc3#
- 1...Be3
- 2.Sxe3#
- 1...Bb4
- 2.Se3#
- 1...Bf4
- 2.Sc3#
- 1...Ba5
- 2.Se3#
- 1...Bg5
- 2.Sc3#
- 1...Bh6
- 2.Sc3#
- 1...Sb4
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sca5
- 2.Qd4#
- 1...Se7
- 2.Qd4#
- 1...Sb8
- 2.Qd4#
- 1...Scd8
- 2.Qd4#
- 1...Sba5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sxd6
- 2.Qc5#
- 1...Sbd8
- 2.Qc5#
- 1...a5
- 2.Sb6#
- 1...a6
- 2.Sb6#
- 1...Qxg2
- Tries
- 1.Bh1?
- 1...Bc3+
- 2.Sxc3#
- 1...Qxh1
- 2.Qxh1#
- 1...Sxd6
- 2.Qc5#
- 1...Qg2
- 2.Bxg2#
- 2.Qxg2#
- 1...Qf3
- 2.Bxf3#
- 1...Bc1
- 2.Sc3#
- 1...Be1
- 2.Se3#
- 1...Be3
- 2.Sxe3#
- 1...Bb4
- 2.Se3#
- 1...Bf4
- 2.Sc3#
- 1...Ba5
- 2.Se3#
- 1...Bg5
- 2.Sc3#
- 1...Bh6
- 2.Sc3#
- 1...Sb4
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sca5
- 2.Qd4#
- 1...Se7
- 2.Qd4#
- 1...Sb8
- 2.Qd4#
- 1...Scd8
- 2.Qd4#
- 1...Sba5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sbd8
- 2.Qc5#
- 1...a5
- 2.Sb6#
- 1...a6
- 2.Sb6#
- 1...Se5!
- 1...Bc3+
- 1.Bh8?
- 1...Bc3+
- 2.Sxc3#
- 1...Qxg2
- 2.Qxg2#
- 1...Sxd6
- 2.Qc5#
- 1...Qf3
- 2.Bxf3#
- 1...Bc1
- 2.Sc3#
- 1...Be1
- 2.Se3#
- 1...Be3
- 2.Sxe3#
- 1...Bb4
- 2.Se3#
- 1...Bf4
- 2.Sc3#
- 1...Ba5
- 2.Se3#
- 1...Bg5
- 2.Sc3#
- 1...Bh6
- 2.Sc3#
- 1...Sb4
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sca5
- 2.Qd4#
- 1...Se7
- 2.Qd4#
- 1...Sb8
- 2.Qd4#
- 1...Scd8
- 2.Qd4#
- 1...Sba5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sbd8
- 2.Qc5#
- 1...a5
- 2.Sb6#
- 1...a6
- 2.Sb6#
- 1...Se5!
- 1...Bc3+
- 1.Rc7?
- 1...Bc3+
- 2.Sxc3#
- 1...Qxg2
- 2.Qxg2#
- 1...Sxd6
- 2.Qc5#
- 1...Qf3
- 2.Bxf3#
- 1...Bc1
- 2.Sc3#
- 1...Be1
- 2.Se3#
- 1...Be3
- 2.Sxe3#
- 1...Bb4
- 2.Se3#
- 1...Bf4
- 2.Sc3#
- 1...Ba5
- 2.Se3#
- 1...Bg5
- 2.Sc3#
- 1...Bh6
- 2.Sc3#
- 1...Sb4
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sca5
- 2.Qd4#
- 1...Se7
- 2.Qd4#
- 1...Sb8
- 2.Qd4#
- 1...Scd8
- 2.Qd4#
- 1...Sba5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sbd8
- 2.Qc5#
- 1...a5
- 2.Sb6#
- 1...a6
- 2.Sb6#
- 1...Se5!
- 1...Bc3+
- 1.Qf2?
- threat
- 2.Qf7#
- 1...Bc3+
- 2.Sxc3#
- 1...Qxg2
- 2.Qxg2#
- 1...Sxd6
- 2.Qc5#
- 1...Qf3
- 2.Bxf3#
- 2.Qxf3#
- 1...Bf4
- 2.Sc3#
- 1...Sd4
- 2.Qxd4#
- 1...Scd8
- 2.Qd4#
- 2.Qxd2#
- 2.Qf5#
- 1...Sc5
- 2.Qxc5#
- 1...Sbd8
- 2.Qc5#
- 1...Se5!
- threat
- 1.Qe3?
- threat
- 2.Bxe4#
- 2.Qxe4#
- 1...Bc3+
- 2.Sxc3#
- 1...Bxe3
- 2.Sxe3#
- 1...Sxd6
- 2.Qc5#
- 1...Qf3
- 2.Bxf3#
- 2.Qxf3#
- 1...Sc5
- 2.Qxc5#
- 1...Qxg2!
- threat
- 1.Bh1?
- Keys
- 1.Bb2!
- 1...Qxg2
- 2.Qxg2#
- 1...Sxd6
- 2.Qc5#
- 1...Qf3
- 2.Bxf3#
- 1...Se5
- 2.Qd4#
- 1...Bc1
- 2.Sc3#
- 1...Be1
- 2.Se3#
- 1...Bc3
- 2.Sxc3#
- 1...Be3
- 2.Sxe3#
- 1...Bb4
- 2.Se3#
- 1...Bf4
- 2.Sc3#
- 1...Ba5
- 2.Se3#
- 1...Bg5
- 2.Sc3#
- 1...Bh6
- 2.Sc3#
- 1...Sb4
- 2.Qd4#
- 1...Sd4
- 2.Qxd4#
- 1...Sca5
- 2.Qd4#
- 1...Se7
- 2.Qd4#
- 1...Sb8
- 2.Qd4#
- 1...Scd8
- 2.Qd4#
- 1...Sba5
- 2.Qc5#
- 1...Sc5
- 2.Qxc5#
- 1...Sbd8
- 2.Qc5#
- 1...a5
- 2.Sb6#
- 1...a6
- 2.Sb6#
- 1...Qxg2
- 1.Bb2!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAB(B),XQ(b)
- Q(b);OGATEB::B(C),XQ(b)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(F)
- B(a);CHECK,N_GUARD::S(E),XB(a)
- B(a);N_GUARD::S(F),XB(a)
- S(d);N_GUARD::QAR1(B)
- S(d);N_GUARD::QAR1(B),XS(d)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(f);N_GUARD,XP(G)::QAR1(B)
- P(e);N_GUARD::S(E)
- Tries
- Try
- B(C);
- Vars
- B(a);CHECK,N_GUARD::S(E),XB(a)
- Q(b);N_SPINQ(b),OGATE,P_PINQ(B),XB(C)::QAB(B),XQ(b)
- S(f);N_GUARD,XP(G)::QAR1(B)
- Q(b);OGATEB::B(C),XQ(b)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(F)
- B(a);N_GUARD::S(F),XB(a)
- S(d);N_GUARD::QAR1(B)
- S(d);N_GUARD::QAR1(B),XS(d)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- P(e);N_GUARD::S(E)
- Refutation
- S(d);
- Try
- B(I);
- Vars
- B(a);CHECK,N_GUARD::S(E),XB(a)
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAB(B),XQ(b)
- S(f);N_GUARD,XP(G)::QAR1(B)
- Q(b);OGATEB::B(C),XQ(b)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(F)
- B(a);N_GUARD::S(F),XB(a)
- S(d);N_GUARD::QAR1(B)
- S(d);N_GUARD::QAR1(B),XS(d)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- P(e);N_GUARD::S(E)
- Refutation
- S(d);
- Try
- R(J);
- Vars
- B(a);CHECK,N_GUARD::S(E),XB(a)
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAB(B),XQ(b)
- S(f);N_GUARD,XP(G)::QAR1(B)
- Q(b);OGATEB::B(C),XQ(b)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(F)
- B(a);N_GUARD::S(F),XB(a)
- S(d);N_GUARD::QAR1(B)
- S(d);N_GUARD::QAR1(B),XS(d)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- P(e);N_GUARD::S(E)
- Refutation
- S(d);
- Try
- Q(B);
- Threat
- QAB(B)
- Vars
- B(a);CHECK,N_GUARD::S(E),XB(a)
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAB(B),XQ(b)
- S(f);N_GUARD,XP(G)::QAR1(B)
- B(a);N_GUARD::S(E)
- S(d);N_GUARD::QAR1(B),XS(d)
- S(f);N_GUARD::QAR1(B),XS(f)
- S(f);N_GUARD::QAR1(B)
- Refutation
- S(d);
- Try
- Q(B);
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,N_GUARD::S(E),XB(a)
- B(a);XQ(B)::S(F),XB(a)
- S(f);N_GUARD,XP(G)::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- Refutation
- Q(b);N_SPINQ(b),XB(C)
- Try
- Actual
- B(I);
- Vars
- Q(b);N_SPINQ(b),OGATE,XB(C)::QAB(B),XQ(b)
- S(f);N_GUARD,XP(G)::QAR1(B)
- Q(b);OGATEB::B(C),XQ(b)
- S(d);N_GUARD::QAR1(B)
- B(a);N_GUARD::S(E)
- B(a);N_GUARD::S(F)
- B(a);N_GUARD,P_PINB(I)::S(E),XB(a)
- B(a);N_GUARD::S(F),XB(a)
- S(d);N_GUARD::QAR1(B),XS(d)
- S(f);N_GUARD::QAR1(B)
- S(f);N_GUARD::QAR1(B),XS(f)
- P(e);N_GUARD::S(E)
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).