MESON Chess Problem Database
Problem Display
PID: 16641 (Nn1n1b2/2N4p/2p4P/ppkbQ3/4R3/1Pp5/6Rp/7K w - - 0 1)
Andrade, Barry Jack da Costa
Chess, 1942
#2
8 + 11
| 98 | Manchester Guardian | 1953 |
| 3936 | The Wizard of Oz | 1999 |
| 3713 | Snap | 2023 |
SOLUTION
- SOUND
- Sets
- 1...Bd6
- 2.Qd4#
- 1...Bxh6
- 2.Qe7#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sa6
- 2.Sxa6#
- 1...Sd7
- 2.Sa6#
- 1...Se6
- 2.Sxe6#
- 1...Sb7
- 2.Se6#
- 1...Sf7
- 2.Se6#
- 1...c2
- 2.Rxc2#
- 1...a4
- 2.b4#
- 1...b4
- 2.Rc4#
- 1...Bd6
- Tries
- 1.Kxh2?
- 1...Bxh6
- 2.Qe7#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sa6
- 2.Sxa6#
- 1...Sd7
- 2.Sa6#
- 1...Se6
- 2.Sxe6#
- 1...Sb7
- 2.Se6#
- 1...Sf7
- 2.Se6#
- 1...c2
- 2.Rxc2#
- 1...a4
- 2.b4#
- 1...b4
- 2.Rc4#
- 1...Bd6!
- 1...Bxh6
- 1.Rge2?
- 1...Bxh6
- 2.Qe7#
- 1...Bd6
- 2.Qd4#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sa6
- 2.Sxa6#
- 1...Sd7
- 2.Sa6#
- 1...Se6
- 2.Sxe6#
- 1...Sb7
- 2.Se6#
- 1...Sf7
- 2.Se6#
- 1...c2
- 2.Rxc2#
- 1...a4
- 2.b4#
- 1...b4!
- 1...Bxh6
- 1.Rf2?
- 1...Bxh6
- 2.Qe7#
- 1...Bd6
- 2.Qd4#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sa6
- 2.Sxa6#
- 1...Sd7
- 2.Sa6#
- 1...Se6
- 2.Sxe6#
- 1...Sb7
- 2.Se6#
- 1...Sf7
- 2.Se6#
- 1...c2
- 2.Rxc2#
- 1...a4
- 2.b4#
- 1...b4!
- 1...Bxh6
- 1.Rxh2?
- 1...Bxh6
- 2.Qe7#
- 1...Bd6
- 2.Qd4#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sa6
- 2.Sxa6#
- 1...Sd7
- 2.Sa6#
- 1...Se6
- 2.Sxe6#
- 1...Sb7
- 2.Se6#
- 1...Sf7
- 2.Se6#
- 1...c2
- 2.Rxc2#
- 1...a4
- 2.b4#
- 1...b4!
- 1...Bxh6
- 1.Rg3?
- threat
- 2.Rxc3#
- 1...c2
- 2.Rc3#
- 1...b4!
- threat
- 1.Rg6?
- threat
- 2.Qd4#
- 1...Bg7
- 2.Qd6#
- 2.Qe7#
- 1...Se6
- 2.Sxe6#
- 1...hxg6!
- threat
- 1.Rf4?
- 1...Bxh6
- 2.Qe7#
- 1...b4
- 2.Rc4#
- 1...Bd6
- 2.Qd4#
- 2.Qe3#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sa6
- 2.Sxa6#
- 1...Sd7
- 2.Sa6#
- 1...Se6
- 2.Sxe6#
- 1...Sb7
- 2.Se6#
- 1...Sf7
- 2.Se6#
- 1...a4
- 2.b4#
- 1...c2!
- 1...Bxh6
- 1.Reg4?
- 1...Bxh6
- 2.Qe7#
- 1...b4
- 2.Rc4#
- 1...Bd6
- 2.Qd4#
- 2.Qe3#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sa6
- 2.Sxa6#
- 1...Sd7
- 2.Sa6#
- 1...Se6
- 2.Sxe6#
- 1...Sb7
- 2.Se6#
- 1...Sf7
- 2.Se6#
- 1...a4
- 2.b4#
- 1...c2!
- 1...Bxh6
- 1.Rh4?
- 1...Bxh6
- 2.Qe7#
- 1...b4
- 2.Rc4#
- 1...Bd6
- 2.Qd4#
- 2.Qe3#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sa6
- 2.Sxa6#
- 1...Sd7
- 2.Sa6#
- 1...Se6
- 2.Sxe6#
- 1...Sb7
- 2.Se6#
- 1...Sf7
- 2.Se6#
- 1...a4
- 2.b4#
- 1...c2!
- 1...Bxh6
- 1.Kxh2?
- Keys
- 1.Ra2!
- 1...Bxh6
- 2.Qe7#
- 1...Bd6
- 2.Qd4#
- 1...Be7
- 2.Qxe7#
- 1...Bg7
- 2.Qe7#
- 1...Sa6
- 2.Sxa6#
- 1...Sd7
- 2.Sa6#
- 1...Se6
- 2.Sxe6#
- 1...Sb7
- 2.Se6#
- 1...Sf7
- 2.Se6#
- 1...c2
- 2.Rxc2#
- 1...a4
- 2.b4#
- 1...b4
- 2.Rxa5#
- 1...Bxh6
- 1.Ra2!
This anticipates 270436(1959)
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(k);SBLOCK::QAB1(E)
- B(k);N_GUARD,XP(F)::QAB(E)
- B(k);N_GUARD::QAB(E),XB(k)
- B(k);N_GUARD::QAB(E)
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(b);OGATEB::R(B),XP(b)
- P(c);N_GUARD::P(C)
- P(d);N_GUARD::R1(D)
- Tries
- Try
- K(A);P-FLIGHT,XP(a)
- Vars
- B(k);N_GUARD,XP(F)::QAB(E)
- B(k);N_GUARD::QAB(E),XB(k)
- B(k);N_GUARD::QAB(E)
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(b);OGATEB::R(B),XP(b)
- P(c);N_GUARD::P(C)
- P(d);N_GUARD::R1(D)
- Refutation
- B(k);P_PINQ(E)
- Try
- R(B);P_SPINR(D)
- Vars
- B(k);N_GUARD,XP(F)::QAB(E)
- B(k);SBLOCK::QAB1(E)
- B(k);N_GUARD::QAB(E),XB(k)
- B(k);N_GUARD::QAB(E)
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(b);OGATEB::R(B),XP(b)
- P(c);N_GUARD::P(C)
- Refutation
- P(d);
- Try
- R(B);P_SPINR(D)
- Vars
- B(k);N_GUARD,XP(F)::QAB(E)
- B(k);SBLOCK::QAB1(E)
- B(k);N_GUARD::QAB(E),XB(k)
- B(k);N_GUARD::QAB(E)
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(b);OGATEB::R(B),XP(b)
- P(c);N_GUARD::P(C)
- Refutation
- P(d);
- Try
- R(B);P_SPINR(D),XP(a)
- Vars
- B(k);N_GUARD,XP(F)::QAB(E)
- B(k);SBLOCK::QAB1(E)
- B(k);N_GUARD::QAB(E),XB(k)
- B(k);N_GUARD::QAB(E)
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(b);OGATEB::R(B),XP(b)
- P(c);N_GUARD::P(C)
- Refutation
- P(d);
- Try
- R(B);P_SPINR(D)
- Threat
- R(B),XP(b)
- Vars
- P(b);::R(B)
- Refutation
- P(d);
- Try
- R(B);P_SPINR(D)
- Threat
- QAB1(E)
- Vars
- S(j);N_GUARD::S(G),XS(j)
- Refutation
- P(h);XR(B)
- Try
- R(D);P_SPINR(B)
- Vars
- B(k);N_GUARD,XP(F)::QAB(E)
- P(d);N_GUARD::R1(D)
- B(k);N_GUARD::QAB(E),XB(k)
- B(k);N_GUARD::QAB(E)
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(c);N_GUARD::P(C)
- Refutation
- P(b);
- Try
- R(D);P_SPINR(B)
- Vars
- B(k);N_GUARD,XP(F)::QAB(E)
- P(d);N_GUARD::R1(D)
- B(k);N_GUARD::QAB(E),XB(k)
- B(k);N_GUARD::QAB(E)
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(c);N_GUARD::P(C)
- Refutation
- P(b);
- Try
- R(D);P_SPINR(B)
- Vars
- B(k);N_GUARD,XP(F)::QAB(E)
- P(d);N_GUARD::R1(D)
- B(k);N_GUARD::QAB(E),XB(k)
- B(k);N_GUARD::QAB(E)
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(c);N_GUARD::P(C)
- Refutation
- P(b);
- Try
- Actual
- R(B);P_SPINR(D)
- Vars
- B(k);N_GUARD,XP(F)::QAB(E)
- B(k);SBLOCK::QAB1(E)
- B(k);N_GUARD::QAB(E),XB(k)
- B(k);N_GUARD::QAB(E)
- S(i);N_GUARD::S(G),XS(i)
- S(i);N_GUARD::S(G)
- S(j);N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
- P(b);OGATEB::R(B),XP(b)
- P(c);N_GUARD::P(C)
- P(d);OGATEB::R(B),XP(c)
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).