MESON Chess Problem Database
Problem Display
PID: 44700 (4Kb2/3p1N2/4k1pr/2p1p1Q1/8/B2n1BN1/8/8 w - - 0 1)
Lewis, Robert Tony
The Problemist, 1954
#2
6 + 8
| 136 | Problem Observer | 2002 |
| 136 | Problem Observer | 2005 |
SOLUTION
- SOUND
- Sets
- 1...Rh1
- 2.Qxg6#
- 1...Rh2
- 2.Qxg6#
- 1...Rh3
- 2.Qxg6#
- 1...Rh4
- 2.Qxg6#
- 1...Rh5
- 2.Qxg6#
- 1...Rh7
- 2.Qxg6#
- 1...Rh8
- 2.Qxg6#
- 1...Bd6
- 2.Sd8#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sf2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...c4
- 2.Sd8#
- 1...e4
- 2.Bg4#
- 1...d5
- 2.Bg4#
- 1...d6
- 2.Sd8#
- 1...Rh1
- Tries
- 1.Kxf8?
- threat
- 2.Qe7#
- 1...e4
- 2.Bg4#
- 1...Rh8+!
- threat
- 1.Sh5?
- threat
- 2.Qf6#
- 2.Qg4#
- 1...Rxh5
- 2.Qxg6#
- 1...Be7
- 2.Sg7#
- 2.Qg4#
- 1...Bg7
- 2.Sxg7#
- 2.Qg4#
- 1...Sf2
- 2.Qf6#
- 2.Qxe5#
- 1...e4
- 2.Bg4#
- 1...gxh5!
- threat
- 1.Bc1?
- 1...Sxc1
- 2.Qxe5#
- 1...Be7
- 2.Qxe7#
- 1...Rh1
- 2.Qxg6#
- 1...Rh2
- 2.Qxg6#
- 1...Rh3
- 2.Qxg6#
- 1...Rh4
- 2.Qxg6#
- 1...Rh5
- 2.Qxg6#
- 1...Rh7
- 2.Qxg6#
- 1...Rh8
- 2.Qxg6#
- 1...Bd6
- 2.Sd8#
- 1...Bg7
- 2.Qe7#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sf2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...e4
- 2.Bg4#
- 1...d5
- 2.Bg4#
- 1...d6
- 2.Sd8#
- 1...c4!
- 1...Sxc1
- 1.Bb2?
- 1...Sxb2
- 2.Qxe5#
- 1...Be7
- 2.Qxe7#
- 1...Rh1
- 2.Qxg6#
- 1...Rh2
- 2.Qxg6#
- 1...Rh3
- 2.Qxg6#
- 1...Rh4
- 2.Qxg6#
- 1...Rh5
- 2.Qxg6#
- 1...Rh7
- 2.Qxg6#
- 1...Rh8
- 2.Qxg6#
- 1...Bd6
- 2.Sd8#
- 1...Bg7
- 2.Qe7#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sf2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...e4
- 2.Bg4#
- 1...d5
- 2.Bg4#
- 1...d6
- 2.Sd8#
- 1...c4!
- 1...Sxb2
- 1.Bb4?
- 1...Sxb4
- 2.Qxe5#
- 1...Be7
- 2.Qxe7#
- 1...Rh1
- 2.Qxg6#
- 1...Rh2
- 2.Qxg6#
- 1...Rh3
- 2.Qxg6#
- 1...Rh4
- 2.Qxg6#
- 1...Rh5
- 2.Qxg6#
- 1...Rh7
- 2.Qxg6#
- 1...Rh8
- 2.Qxg6#
- 1...Bd6
- 2.Sd8#
- 1...Bg7
- 2.Qe7#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sf2
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...c4
- 2.Sd8#
- 1...e4
- 2.Bg4#
- 1...d5
- 2.Bg4#
- 1...d6
- 2.Sd8#
- 1...cxb4!
- 1...Sxb4
- 1.Bxc5?
- threat
- 2.Sd8#
- 1...Sxc5
- 2.Qxe5#
- 1...Be7
- 2.Qxe7#
- 1...Bxc5!
- threat
- 1.Be4?
- 1...Be7
- 2.Qxe7#
- 1...Rh1
- 2.Qxg6#
- 1...Rh2
- 2.Qxg6#
- 1...Rh3
- 2.Qxg6#
- 1...Rh4
- 2.Qxg6#
- 1...Rh5
- 2.Qxg6#
- 1...Rh7
- 2.Qxg6#
- 1...Rh8
- 2.Qxg6#
- 1...Bd6
- 2.Sd8#
- 1...Bg7
- 2.Qe7#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sf2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...c4
- 2.Sd8#
- 1...d6
- 2.Sd8#
- 1...d5!
- 1...Be7
- 1.Bc6?
- 1...Be7
- 2.Qxe7#
- 1...Rh1
- 2.Qxg6#
- 1...Rh2
- 2.Qxg6#
- 1...Rh3
- 2.Qxg6#
- 1...Rh4
- 2.Qxg6#
- 1...Rh5
- 2.Qxg6#
- 1...Rh7
- 2.Qxg6#
- 1...Rh8
- 2.Qxg6#
- 1...Bd6
- 2.Sd8#
- 1...Bg7
- 2.Qe7#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sf2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...c4
- 2.Sd8#
- 1...e4
- 2.Bd5#
- 2.Bxd7#
- 1...d5
- 2.Bd7#
- 1...d6
- 2.Sd8#
- 1...dxc6!
- 1...Be7
- 1.Ba8?
- 1...Be7
- 2.Qxe7#
- 1...Rh1
- 2.Qxg6#
- 1...Rh2
- 2.Qxg6#
- 1...Rh3
- 2.Qxg6#
- 1...Rh4
- 2.Qxg6#
- 1...Rh5
- 2.Qxg6#
- 1...Rh7
- 2.Qxg6#
- 1...Rh8
- 2.Qxg6#
- 1...Bd6
- 2.Sd8#
- 1...Bg7
- 2.Qe7#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sf2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...c4
- 2.Sd8#
- 1...e4
- 2.Bd5#
- 1...d6
- 2.Sd8#
- 1...d5!
- 1...Be7
- 1.Kxf8?
- Keys
- 1.Bb7!
- 1...Be7
- 2.Qxe7#
- 1...Rh1
- 2.Qxg6#
- 1...Rh2
- 2.Qxg6#
- 1...Rh3
- 2.Qxg6#
- 1...Rh4
- 2.Qxg6#
- 1...Rh5
- 2.Qxg6#
- 1...Rh7
- 2.Qxg6#
- 1...Rh8
- 2.Qxg6#
- 1...Bd6
- 2.Sd8#
- 1...Bg7
- 2.Qe7#
- 1...Sc1
- 2.Qxe5#
- 1...Se1
- 2.Qxe5#
- 1...Sb2
- 2.Qxe5#
- 1...Sf2
- 2.Qxe5#
- 1...Sb4
- 2.Qxe5#
- 1...Sf4
- 2.Qxe5#
- 1...c4
- 2.Sd8#
- 1...e4
- 2.Bd5#
- 1...d5
- 2.Bc8#
- 1...d6
- 2.Sd8#
- 1...Be7
- 1.Bb7!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 2
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(f);N_GUARD::QAR2(D),XP(e)
- B(h);SBLOCK::S(E)
- B(h);N_GUARD::QAR1(D),XB(h)
- B(h);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XP(c)
- P(b);::S(E)
- P(c);::B(B)
- P(g);SBLOCK::B(B)
- P(g);SBLOCK::S(E)
- Tries
- Try
- K(F);P-FLIGHT,XB(h)
- Threat
- QAR1(D)
- Vars
- P(c);::B(B)
- Refutation
- R(f);CHECK
- Try
- S(C);
- Threat
- DUALS(2)
- Vars
- R(f);N_GUARD,XS(C)::QAR2(D),XP(e)
- P(c);::B(B)
- Refutation
- P(e);XS(C)
- Try
- B(A);
- Vars
- S(a);N_GUARD,XB(A)::QAR1(D),XP(c)
- B(h);N_GUARD::QAR1(D),XB(h)
- R(f);N_GUARD::QAR2(D),XP(e)
- B(h);SBLOCK::S(E)
- B(h);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XP(c)
- P(c);::B(B)
- P(g);SBLOCK::B(B)
- P(g);SBLOCK::S(E)
- Refutation
- P(b);
- Try
- B(A);
- Vars
- S(a);N_GUARD,XB(A)::QAR1(D),XP(c)
- B(h);N_GUARD::QAR1(D),XB(h)
- R(f);N_GUARD::QAR2(D),XP(e)
- B(h);SBLOCK::S(E)
- B(h);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XP(c)
- P(c);::B(B)
- P(g);SBLOCK::B(B)
- P(g);SBLOCK::S(E)
- Refutation
- P(b);
- Try
- B(A);
- Vars
- S(a);N_GUARD,XB(A)::QAR1(D),XP(c)
- B(h);N_GUARD::QAR1(D),XB(h)
- R(f);N_GUARD::QAR2(D),XP(e)
- B(h);SBLOCK::S(E)
- B(h);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XP(c)
- P(b);::S(E)
- P(c);::B(B)
- P(g);SBLOCK::B(B)
- P(g);SBLOCK::S(E)
- Refutation
- P(b);XB(A)
- Try
- B(A);XP(b)
- Threat
- S(E)
- Vars
- S(a);N_GUARD,XB(A)::QAR1(D),XP(c)
- B(h);N_GUARD::QAR1(D),XB(h)
- Refutation
- B(h);XB(A)
- Try
- B(B);
- Vars
- B(h);N_GUARD::QAR1(D),XB(h)
- R(f);N_GUARD::QAR2(D),XP(e)
- B(h);SBLOCK::S(E)
- B(h);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XP(c)
- P(b);::S(E)
- P(g);SBLOCK::S(E)
- Refutation
- P(g);
- Try
- B(B);
- Vars
- B(h);N_GUARD::QAR1(D),XB(h)
- R(f);N_GUARD::QAR2(D),XP(e)
- B(h);SBLOCK::S(E)
- B(h);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XP(c)
- P(b);::S(E)
- P(g);SBLOCK::B(B)
- P(g);SBLOCK::S(E)
- Refutation
- P(g);XB(B)
- Try
- B(B);
- Vars
- B(h);N_GUARD::QAR1(D),XB(h)
- R(f);N_GUARD::QAR2(D),XP(e)
- B(h);SBLOCK::S(E)
- B(h);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XP(c)
- P(b);::S(E)
- P(c);::B(B)
- P(g);SBLOCK::S(E)
- Refutation
- P(g);
- Try
- Actual
- B(B);
- Vars
- B(h);N_GUARD::QAR1(D),XB(h)
- R(f);N_GUARD::QAR2(D),XP(e)
- B(h);SBLOCK::S(E)
- B(h);N_GUARD::QAR1(D)
- S(a);N_GUARD::QAR1(D),XP(c)
- P(b);::S(E)
- P(c);::B(B)
- P(g);OGATEB,SBLOCK::B(B)
- P(g);SBLOCK::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).