MESON Chess Problem Database
Problem Display
PID: 67821 (2bN1b2/2R3pR/1P1kP2p/p6p/1ppBP1nP/2r1n1NB/1QP5/6K1 w - - 0 1)
Lewis, Robert Tony
Chess, 1948
#2
13 + 12
SOLUTION
- SOUND
- Sets
- 1...Rxc2
- 2.Bc5#
- 1...Ra3
- 2.Bc5#
- 1...Rb3
- 2.Bc5#
- 1...Rd3
- 2.Bc5#
- 1...Ba6
- 2.Rd7#
- 1...Bxe6
- 2.Sb7#
- 1...Bb7
- 2.Rd7#
- 1...Bd7
- 2.Rxd7#
- 1...Be7
- 2.Rc6#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sxc2
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Sf7#
- 1...Sh2
- 2.Sf7#
- 1...Se5
- 2.Bc5#
- 1...Sf6
- 2.Sf7#
- 1...b3
- 2.Qa3#
- 1...a4
- 2.Qxb4#
- 1...g5
- 2.Rc6#
- 1...g6
- 2.Rc6#
- 1...Rxc2
- Tries
- 1.Kh1?
- 1...Rxc2
- 2.Bc5#
- 1...Bxe6
- 2.Sb7#
- 1...Sxc2
- 2.Sf5#
- 1...Bd7
- 2.Rxd7#
- 1...Ra3
- 2.Bc5#
- 1...Rb3
- 2.Bc5#
- 1...Rd3
- 2.Bc5#
- 1...Ba6
- 2.Rd7#
- 1...Bb7
- 2.Rd7#
- 1...Be7
- 2.Rc6#
- 1...Sd1
- 2.Sf5#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sh2
- 2.Sf7#
- 1...Se5
- 2.Bc5#
- 1...Sf6
- 2.Sf7#
- 1...b3
- 2.Qa3#
- 1...a4
- 2.Qxb4#
- 1...g5
- 2.Rc6#
- 1...g6
- 2.Rc6#
- 1...Sf2+!
- 1...Rxc2
- 1.Bxg4?
- threat
- 2.Sf7#
- 1...Bxe6
- 2.Sb7#
- 1...Sxg4
- 2.Sf5#
- 1...Bd7
- 2.Rxd7#
- 1...Sf5
- 2.Sxf5#
- 1...hxg4!
- threat
- 1.Rhxg7?
- threat
- 2.Rc6#
- 1...Bb7
- 2.Rcd7#
- 2.Rgd7#
- 1...Bd7
- 2.Rcxd7#
- 2.Rgxd7#
- 1...Se5
- 2.Bc5#
- 1...Bxg7!
- threat
- 1.Qa1?
- 1...Rxc2
- 2.Bc5#
- 1...Bxe6
- 2.Sb7#
- 1...Sxc2
- 2.Sf5#
- 1...Bd7
- 2.Rxd7#
- 1...Sd1
- 2.Sf5#
- 1...Ra3
- 2.Bc5#
- 1...Rb3
- 2.Bc5#
- 1...Rd3
- 2.Bc5#
- 1...Ba6
- 2.Rd7#
- 1...Bb7
- 2.Rd7#
- 1...Be7
- 2.Rc6#
- 1...Sf1
- 2.Sf5#
- 1...Sg2
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.Sf7#
- 1...Sh2
- 2.Sf7#
- 1...Se5
- 2.Bc5#
- 1...Sf6
- 2.Sf7#
- 1...b3
- 2.Qa3#
- 1...g5
- 2.Rc6#
- 1...g6
- 2.Rc6#
- 1...a4!
- 1...Rxc2
- 1.e7?
- threat
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rxc2
- 2.Bc5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Sxc2
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bd7
- 2.exf8Q#
- 2.exf8B#
- 1...Sd1
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Ra3
- 2.Bc5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rb3
- 2.Bc5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Rd3
- 2.Bc5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bf5
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Ba6
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Be6
- 2.Sb7#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bb7
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Sf1
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Sg2
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Sd5
- 2.e8S#
- 1...Sf5
- 2.e8S#
- 1...Sf2
- 2.Sf7#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Sh2
- 2.Sf7#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Se5
- 2.Bc5#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Sf6
- 2.Sf7#
- 2.exf8Q#
- 2.exf8B#
- 1...b3
- 2.Qa3#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...a4
- 2.Qxb4#
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...g5
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...g6
- 2.exf8Q#
- 2.exf8B#
- 2.e8S#
- 1...Bxe7!
- threat
- 1.Kh1?
- Keys
- 1.Bg2!
- 1...Rxc2
- 2.Bc5#
- 1...Bxe6
- 2.Sb7#
- 1...Sxc2
- 2.Sf5#
- 1...Sxg2
- 2.Sf5#
- 1...Bd7
- 2.Rxd7#
- 1...Sd1
- 2.Sf5#
- 1...Ra3
- 2.Bc5#
- 1...Rb3
- 2.Bc5#
- 1...Rd3
- 2.Bc5#
- 1...Ba6
- 2.Rd7#
- 1...Bb7
- 2.Rd7#
- 1...Be7
- 2.Rc6#
- 1...Sf1
- 2.Sf5#
- 1...Sd5
- 2.Sf5#
- 1...Sf5
- 2.Sxf5#
- 1...Sf2
- 2.e5#
- 1...Sh2
- 2.e5#
- 1...Se5
- 2.Bc5#
- 1...Sf6
- 2.e5#
- 1...b3
- 2.Qa3#
- 1...a4
- 2.Qxb4#
- 1...g5
- 2.Rc6#
- 1...g6
- 2.Rc6#
- 1...Rxc2
- 1.Bg2!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(a);XP(C)::B(F)
- R(a);::B(F)
- B(k);N_GUARD::R1(K)
- B(k);N_GUARD,SBLOCK,XP(J)::S(M)
- B(k);N_GUARD::R1(K),XB(k)
- B(l);SBLOCK::R1(K)
- S(b);N_GUARD::S(D)
- S(b);N_GUARD,XP(C)::S(D)
- S(b);N_GUARD::S(D),XS(b)
- S(e);::S(M)
- S(e);SBLOCK::B(F)
- P(c);OGATEB::QAB(B)
- P(f);N_GUARD::QAB(B),XP(c)
- P(j);::R1(K)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(a);XP(C)::B(F)
- B(k);N_GUARD,SBLOCK,XP(J)::S(M)
- S(b);N_GUARD,XP(C)::S(D)
- B(k);N_GUARD::R1(K),XB(k)
- R(a);::B(F)
- B(k);N_GUARD::R1(K)
- B(k);N_GUARD,P_PINP(G)::R1(K)
- B(l);SBLOCK::R1(K)
- S(b);N_GUARD::S(D)
- S(b);N_GUARD::S(D),XS(b)
- S(e);::S(M)
- S(e);SBLOCK::B(F)
- P(c);OGATEB::QAB(B)
- P(f);N_GUARD::QAB(B),XP(c)
- P(j);::R1(K)
- Refutation
- S(e);CHECK
- Try
- B(E);XS(e)
- Threat
- S(M)
- Vars
- B(k);N_GUARD,XP(J)::S(M)
- S(b);N_GUARD,XB(E)::S(D)
- B(k);N_GUARD::R1(K),XB(k)
- S(b);N_GUARD::S(D),XS(b)
- Refutation
- P(g);XB(E)
- Try
- R(L);XP(j)
- Threat
- R1(K)
- Vars
- S(e);SBLOCK::B(F)
- Refutation
- B(l);XR(L)
- Try
- Q(B);
- Vars
- R(a);XP(C)::B(F)
- B(k);N_GUARD,SBLOCK,XP(J)::S(M)
- S(b);N_GUARD,XP(C)::S(D)
- B(k);N_GUARD::R1(K),XB(k)
- S(b);N_GUARD::S(D)
- R(a);::B(F)
- B(k);N_GUARD::R1(K)
- B(l);SBLOCK::R1(K)
- S(b);N_GUARD::S(D),XS(b)
- S(e);::S(M)
- S(e);SBLOCK::B(F)
- P(c);OGATEB::QAB(B)
- P(j);::R1(K)
- Refutation
- P(f);
- Try
- P(J);
- Threat
- DUALS(3)
- Vars
- B(k);::PXB(l)=Q
- S(b);::P=S
- Refutation
- B(l);XP(J)
- Try
- Actual
- B(E);
- Vars
- R(a);XP(C)::B(F)
- B(k);N_GUARD,SBLOCK,XP(J)::S(M)
- S(b);N_GUARD,XP(C)::S(D)
- S(b);N_GUARD,XB(E)::S(D)
- B(k);N_GUARD::R1(K),XB(k)
- S(b);N_GUARD::S(D)
- R(a);::B(F)
- B(k);N_GUARD::R1(K)
- B(l);SBLOCK::R1(K)
- S(b);N_GUARD::S(D),XS(b)
- S(e);N_GUARD::P(G)
- S(e);SBLOCK::B(F)
- P(c);OGATEB::QAB(B)
- P(f);N_GUARD::QAB(B),XP(c)
- P(j);::R1(K)
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).