MESON Chess Problem Database
Problem Display
PID: 68375 (8/2Nb4/3P2p1/2p1ppK1/1nBk4/1Pqp2N1/5P2/B6Q w - - 0 1)
Lewis, Robert Tony
Chess, 1949
#2
9 + 9
SOLUTION
- SOUND
- Sets
- 1...Qxa1
- 2.Qxa1#
- 1...Qb2
- 2.Bxb2#
- 1...Ba4
- 2.Se6#
- 1...Bb5
- 2.Sxb5#
- 2.Se6#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sb5#
- 2.Sxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Se6#
- 1...Sa2
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa6
- 2.Qd5#
- 1...Sc6
- 2.Sb5#
- 2.Qd5#
- 1...d2
- 2.Se2#
- 1...e4
- 2.Qh8#
- 1...f4
- 2.Qe4#
- 1...Qxa1
- Tries
- 1.Kxg6?
- 1...Qxa1
- 2.Qxa1#
- 1...Qb2
- 2.Bxb2#
- 1...e4
- 2.Qh8#
- 1...Ba4
- 2.Sxf5#
- 2.Se6#
- 1...Bb5
- 2.Sxf5#
- 2.Sxb5#
- 2.Se6#
- 1...Bc6
- 2.Sxf5#
- 2.Se6#
- 1...Be6
- 2.Sb5#
- 2.Sxe6#
- 1...Bc8
- 2.Sb5#
- 1...Sa2
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa6
- 2.Qd5#
- 1...Sc6
- 2.Sb5#
- 2.Qd5#
- 1...d2
- 2.Se2#
- 1...f4
- 2.Qe4#
- 1...Be8+!
- 1...Qxa1
- 1.Sxf5+?
- 1...Bxf5
- 2.Sb5#
- 1...gxf5!
- 1...Bxf5
- 1.Sd5?
- threat
- 2.Bxc3#
- 1...Qxa1
- 2.Qxa1#
- 1...Sxd5
- 2.Qxd5#
- 1...Qb2
- 2.Bxb2#
- 1...Sa2!
- threat
- 1.Bb2?
- 1...e4
- 2.Qh8#
- 1...Ba4
- 2.Se6#
- 1...Bb5
- 2.Sxb5#
- 2.Se6#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sb5#
- 2.Sxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Se6#
- 1...Sa2
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa6
- 2.Qd5#
- 1...Sc6
- 2.Sb5#
- 2.Qd5#
- 1...d2
- 2.Se2#
- 1...f4
- 2.Qe4#
- 1...Qxb2!
- 1...e4
- 1.Ba6?
- 1...Qxa1
- 2.Qxa1#
- 1...Sxa6
- 2.Qd5#
- 1...Qb2
- 2.Bxb2#
- 1...e4
- 2.Qh8#
- 1...Ba4
- 2.Se6#
- 1...Bb5
- 2.Sxb5#
- 2.Se6#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sb5#
- 2.Sxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Se6#
- 1...Sa2
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sc6
- 2.Sb5#
- 2.Qd5#
- 1...d2
- 2.Se2#
- 1...f4
- 2.Qe4#
- 1...c4!
- 1...Qxa1
- 1.Qc6?
- threat
- 2.Sb5#
- 1...Bxc6
- 2.Se6#
- 1...e4!
- threat
- 1.Qe1?
- threat
- 2.Bxc3#
- 2.Qxc3#
- 2.Qe3#
- 1...Qxa1
- 2.Qxa1#
- 1...e4
- 2.Bxc3#
- 2.Qxc3#
- 1...Qb2
- 2.Bxb2#
- 1...Sa2
- 2.Qe3#
- 1...Sc2
- 2.Bxc3#
- 2.Qxc3#
- 1...d2
- 2.Qe3#
- 1...f4
- 2.Bxc3#
- 2.Qxc3#
- 2.Qe4#
- 1...Sd5!
- threat
- 1.Qh4+?
- 1...e4
- 2.Qh8#
- 1...f4!
- 1...e4
- 1.Kxg6?
- Keys
- 1.Qa8!
- 1...Qxa1
- 2.Qxa1#
- 1...Qb2
- 2.Bxb2#
- 1...e4
- 2.Qh8#
- 1...Ba4
- 2.Se6#
- 1...Bb5
- 2.Sxb5#
- 2.Se6#
- 1...Bc6
- 2.Se6#
- 1...Be6
- 2.Sb5#
- 2.Sxe6#
- 1...Bc8
- 2.Sb5#
- 1...Be8
- 2.Se6#
- 1...Sa2
- 2.Qd5#
- 1...Sc2
- 2.Qd5#
- 1...Sd5
- 2.Qxd5#
- 1...Sa6
- 2.Qd5#
- 1...Sc6
- 2.Sb5#
- 1...d2
- 2.Se2#
- 1...f4
- 2.Qe4#
- 1...Qxa1
- 1.Qa8!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(B),XQ(a)
- Q(a);OGATEB::B(A),XQ(a)
- B(i);N_GUARD::S(I)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(b);N_GUARD::S(E)
- P(f);OGATEB::QAB(B)
- P(g);N_GUARD::QAR1(B)
- Tries
- Try
- K(G);P-FLIGHT,XP(h)
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(B),XQ(a)
- Q(a);OGATEB::B(A),XQ(a)
- P(f);OGATEB::QAB(B)
- B(i);N_GUARD::S(I)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(b);N_GUARD::S(E)
- P(g);N_GUARD::QAR1(B)
- Refutation
- B(i);CHECK
- Try
- S(E);CHECK,XP(g)
- Vars
- B(i);XS(E)::S(I)
- Refutation
- P(h);XS(E)
- Try
- S(I);
- Threat
- B(A),XQ(a)
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(B),XQ(a)
- S(c);OGATE,XS(I)::QAR1(B),XS(c)
- Q(a);OGATEB::B(A),XQ(a)
- Refutation
- S(c);
- Try
- B(A);
- Vars
- P(f);OGATEB::QAB(B)
- B(i);N_GUARD::S(I)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(b);N_GUARD::S(E)
- P(g);N_GUARD::QAR1(B)
- Refutation
- Q(a);N_SPINQ(a),XB(A)
- Try
- B(F);
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(B),XQ(a)
- S(c);N_GUARD,XB(F)::QAR1(B)
- Q(a);OGATEB::B(A),XQ(a)
- P(f);OGATEB::QAB(B)
- B(i);N_GUARD::S(I)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- P(b);N_GUARD::S(E)
- P(g);N_GUARD::QAR1(B)
- Refutation
- P(e);
- Try
- Q(B);
- Threat
- S(I)
- Vars
- B(i);N_GUARD,XQ(B)::S(I)
- Refutation
- P(f);
- Try
- Q(B);
- Threat
- DUALS(3)
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(B),XQ(a)
- Q(a);OGATEB::B(A),XQ(a)
- S(c);::QAB1(B)
- P(b);::QAB1(B)
- Refutation
- S(c);
- Try
- Q(B);CHECK
- Vars
- P(f);OGATEB,P_SPINP(f)::QAB(B)
- Refutation
- P(g);P_SPINP(g)
- Try
- Actual
- Q(B);
- Vars
- Q(a);N_SPINQ(a),OGATE,XB(A)::QAB(B),XQ(a)
- Q(a);OGATEB::B(A),XQ(a)
- P(f);OGATEB::QAB(B)
- B(i);N_GUARD::S(I)
- S(c);N_GUARD::QAR1(B)
- S(c);N_GUARD::QAR1(B),XS(c)
- S(c);S_CUTB(i)::S(I)
- P(b);N_GUARD::S(E)
- P(g);N_GUARD::QAR1(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).