MESON Chess Problem Database
Problem Display
PID: 71757 (6RB/2pr1p2/KpNn1N1p/1nr2k2/5Pp1/p6b/B4R2/7Q w - - 0 1)
Lewis, Robert Tony
Chess, 1952
#2
9 + 12
| 56 | The Problemist | 2007 |
| 1099 | WCSC | 2007 |
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Qd5#
- 1...Rc2
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Rc4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.fxe5#
- 1...Rxc6
- 2.Qd5#
- 1...Re7
- 2.Sxe7#
- 1...Rd8
- 2.Se7#
- 1...Bf1
- 2.Qh5#
- 1...Bg2
- 2.Qh5#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Sc4
- 2.Qe4#
- 1...Se4
- 2.Qxe4#
- 1...Sb7
- 2.Qe4#
- 1...Sc8
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...g3
- 2.Qxh3#
- 1...h5
- 2.Rg5#
- 1...Rc1
- Tries
- 1.Bb1+?
- 1...Rc2
- 2.Qd5#
- 1...Se4
- 2.Qxe4#
- 1...Ke6!
- 1...Rc2
- 1.Bb3?
- 1...Rxc6
- 2.Qd5#
- 1...Rc4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Sc4
- 2.Qe4#
- 1...Re5
- 2.fxe5#
- 1...Rc1
- 2.Qd5#
- 1...Rc2
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re7
- 2.Sxe7#
- 1...Rd8
- 2.Se7#
- 1...Bf1
- 2.Qh5#
- 1...Bg2
- 2.Qh5#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Se4
- 2.Qxe4#
- 1...Sb7
- 2.Qe4#
- 1...Sc8
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...g3
- 2.Qxh3#
- 1...h5
- 2.Rg5#
- 1...a2!
- 1...Rxc6
- 1.Bc4?
- 1...Rxc4
- 2.Qd5#
- 1...Rxc6
- 2.Qd5#
- 1...Sxc4
- 2.Qe4#
- 1...Rd5
- 2.Qxd5#
- 1...Re5
- 2.fxe5#
- 1...Re7
- 2.Sxe7#
- 1...Rd8
- 2.Se7#
- 1...Bf1
- 2.Qh5#
- 1...Bg2
- 2.Qh5#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Se4
- 2.Qxe4#
- 1...Sb7
- 2.Qe4#
- 1...Sc8
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...g3
- 2.Qxh3#
- 1...h5
- 2.Rg5#
- 1...a2!
- 1...Rxc4
- 1.Rxg4?
- 1...Rxc6
- 2.Qd5#
- 1...Rc4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Sc4
- 2.Qe4#
- 1...Re5
- 2.fxe5#
- 1...Rc1
- 2.Qd5#
- 1...Rc2
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re7
- 2.Sxe7#
- 1...Rd8
- 2.Se7#
- 1...Bf1
- 2.Qh5#
- 1...Bg2
- 2.Qh5#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Se4
- 2.Qxe4#
- 1...Sb7
- 2.Qe4#
- 1...Sc8
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...h5
- 2.Rg5#
- 1...Bxg4!
- 1...Rxc6
- 1.Qg2?
- 1...Rxc6
- 2.Qd5#
- 1...Rc4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Sc4
- 2.Qe4#
- 1...Re5
- 2.fxe5#
- 1...Rc1
- 2.Qd5#
- 1...Rc2
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re7
- 2.Sxe7#
- 1...Rd8
- 2.Se7#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Se4
- 2.Qxe4#
- 1...Sb7
- 2.Qe4#
- 1...Sc8
- 2.Qe4#
- 1...Se8
- 2.Qe4#
- 1...g3
- 2.Qxh3#
- 1...h5
- 2.Rg5#
- 1...Bxg2!
- 1...Rxc6
- 1.Qb1+?
- 1...Se4
- 2.Qxe4#
- 1...Rc2!
- 1...Se4
- 1.Qxh3?
- threat
- 2.Qxg4#
- 2.Qh5#
- 1...Rc4
- 2.Qxg4#
- 1...Rd5
- 2.Qxg4#
- 1...Sc4
- 2.Qxg4#
- 1...Se4
- 2.Qxg4#
- 1...h5
- 2.Rg5#
- 2.Qxh5#
- 1...gxh3!
- threat
- 1.Bb1+?
- Keys
- 1.Qd1!
- 1...Rxc6
- 2.Qd5#
- 1...Rc4
- 2.Qd5#
- 1...Rd5
- 2.Qxd5#
- 1...Sc4
- 2.Qxd7#
- 1...Re5
- 2.fxe5#
- 1...Rc1
- 2.Qd5#
- 1...Rc2
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Re7
- 2.Sxe7#
- 1...Rd8
- 2.Se7#
- 1...Bf1
- 2.Qxg4#
- 1...Bg2
- 2.Qxg4#
- 1...Sc3
- 2.Sd4#
- 1...Sd4
- 2.Sxd4#
- 1...Sa7
- 2.Sd4#
- 1...Se4
- 2.Qxd7#
- 1...Sb7
- 2.Qxd7#
- 1...Sc8
- 2.Qxd7#
- 1...Se8
- 2.Qxd7#
- 1...g3
- 2.Qh5#
- 1...h5
- 2.Rg5#
- 1...Rxc6
- 1.Qd1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 8
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- R(e);N_GUARD::QAR2(A)
- R(e);N_GUARD::QAR2(A),XR(e)
- R(e);OGATE::R(C)+P(D),XR(e)
- R(e);N_GUARD,XS(F)::QAR2(A)
- R(k);N_GUARD::S(F),XR(k)
- R(k);N_GUARD::S(F)
- B(b);OGATE::QAR2(A)
- S(d);N_GUARD::S(F)
- S(d);N_GUARD::S(F),XS(d)
- S(h);N_GUARD::QAB1(A)
- S(h);N_GUARD::QAB1(A),XS(h)
- P(c);OGATEB::QAB(A),XB(b)
- P(i);N_GUARD::R1(H)
- Tries
- Try
- B(B);CHECK
- Vars
- R(e);P_SPINR(e)::QAR2(A)
- S(h);N_GUARD,P_SPINS(h)::QAB1(A),XS(h)
- Refutation
- K(f);S_FLIGHT
- Try
- B(B);
- Vars
- R(e);N_GUARD,XS(F)::QAR2(A)
- R(e);N_GUARD::QAR2(A)
- R(e);N_GUARD::QAR2(A),XR(e)
- S(h);N_GUARD::QAB1(A)
- R(e);OGATE::R(C)+P(D),XR(e)
- R(k);N_GUARD::S(F),XR(k)
- R(k);N_GUARD::S(F)
- B(b);OGATE::QAR2(A)
- S(d);N_GUARD::S(F)
- S(d);N_GUARD::S(F),XS(d)
- S(h);N_GUARD::QAB1(A),XS(h)
- P(c);OGATEB::QAB(A),XB(b)
- P(i);N_GUARD::R1(H)
- Refutation
- P(a);
- Try
- B(B);
- Vars
- R(e);N_GUARD,XB(B)::QAR2(A)
- R(e);N_GUARD,XS(F)::QAR2(A)
- S(h);N_GUARD,XB(B)::QAB1(A)
- R(e);N_GUARD::QAR2(A),XR(e)
- R(e);OGATE::R(C)+P(D),XR(e)
- R(k);N_GUARD::S(F),XR(k)
- R(k);N_GUARD::S(F)
- B(b);OGATE::QAR2(A)
- S(d);N_GUARD::S(F)
- S(d);N_GUARD::S(F),XS(d)
- S(h);N_GUARD::QAB1(A),XS(h)
- S(h);N_GUARD::QAB1(A)
- P(c);OGATEB::QAB(A),XB(b)
- P(i);N_GUARD::R1(H)
- Refutation
- P(a);
- Try
- R(H);XP(c)
- Vars
- R(e);N_GUARD,XS(F)::QAR2(A)
- R(e);N_GUARD::QAR2(A)
- R(e);N_GUARD::QAR2(A),XR(e)
- S(h);N_GUARD::QAB1(A)
- R(e);OGATE::R(C)+P(D),XR(e)
- R(k);N_GUARD::S(F),XR(k)
- R(k);N_GUARD::S(F)
- B(b);OGATE::QAR2(A)
- S(d);N_GUARD::S(F)
- S(d);N_GUARD::S(F),XS(d)
- S(h);N_GUARD::QAB1(A),XS(h)
- P(i);N_GUARD::R1(H)
- Refutation
- B(b);XR(H)
- Try
- Q(A);
- Vars
- R(e);N_GUARD,XS(F)::QAR2(A)
- R(e);N_GUARD::QAR2(A)
- R(e);N_GUARD::QAR2(A),XR(e)
- S(h);N_GUARD::QAB1(A)
- R(e);OGATE::R(C)+P(D),XR(e)
- R(k);N_GUARD::S(F),XR(k)
- R(k);N_GUARD::S(F)
- S(d);N_GUARD::S(F)
- S(d);N_GUARD::S(F),XS(d)
- S(h);N_GUARD::QAB1(A),XS(h)
- P(c);OGATEB::QAB(A),XB(b)
- P(i);N_GUARD::R1(H)
- Refutation
- B(b);XQ(A)
- Try
- Q(A);CHECK
- Vars
- S(h);N_GUARD,P_SPINS(h)::QAB1(A),XS(h)
- Refutation
- R(e);P_SPINR(e)
- Try
- Q(A);P_PINP(c),XB(b)
- Threat
- DUALS(2)
- Vars
- R(e);::QAB1(A),XP(c)
- S(h);::QAB1(A),XP(c)
- Refutation
- P(c);N_SPINP(c),XQ(A)
- Try
- Actual
- Q(A);
- Vars
- R(e);N_GUARD,XS(F)::QAR2(A)
- R(e);N_GUARD::QAR2(A)
- R(e);N_GUARD::QAR2(A),XR(e)
- S(h);OGATE::QAB(A),XR(k)
- R(e);OGATE::R(C)+P(D),XR(e)
- R(k);N_GUARD::S(F),XR(k)
- R(k);N_GUARD::S(F)
- B(b);N_GUARD::QAB1(A),XP(c)
- S(d);N_GUARD::S(F)
- S(d);N_GUARD::S(F),XS(d)
- P(c);OGATE::QAR2(A)
- P(i);N_GUARD::R1(H)
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).