MESON Chess Problem Database
Problem Display
PID: 176314 (1BRRB3/8/2PPp3/1nnkp3/1P2p3/4P1p1/3NNpQ1/5K2 w - - 0 1)
Petkov, Petko Andonov
Schach-Echo, 1963
#2
12 + 8
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sxd6
- 2.Sc3#
- 2.Rxd6#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Sa3
- Tries
- 1.Ba7?
- 1...Sxd6
- 2.Sc3#
- 1...Sxa7
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sd7!
- 1...Sxd6
- 1.Bh5?
- 1...Sxd6
- 2.Sc3#
- 2.Rxd6#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Sc7!
- 1...Sxd6
- 1.Bg6?
- 1...Sxd6
- 2.Sc3#
- 2.Rxd6#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sb3
- 2.Bxe4#
- 2.Qxe4#
- 1...Sd3
- 2.Bxe4#
- 2.Qxe4#
- 1...Sa4
- 2.Bxe4#
- 2.Qxe4#
- 1...Sa6
- 2.Bxe4#
- 2.Qxe4#
- 1...Sb7
- 2.Bxe4#
- 2.Qxe4#
- 1...Sd7
- 2.Bxe4#
- 2.Qxe4#
- 1...Sc7!
- 1...Sxd6
- 1.Bd7?
- 1...Sxd6
- 2.Sc3#
- 1...Sxd7
- 2.Qxe4#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sc7!
- 1...Sxd6
- 1.Bf7?
- 1...Sxd6
- 2.Sc3#
- 2.Rxd6#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...Sc7!
- 1...Sxd6
- 1.Rc7?
- 1...Sxd6
- 2.Sc3#
- 1...Sxc7
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sd7!
- 1...Sxd6
- 1.Rd7?
- 1...Sxd6
- 2.Sc3#
- 2.Rxd6#
- 1...Sxd7
- 2.Qxe4#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sc7!
- 1...Sxd6
- 1.Qh1?
- 1...Sxd6
- 2.Sc3#
- 2.Rxd6#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sc7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sd7
- 2.Qxe4#
- 1...g2+!
- 1...Sxd6
- 1.c7?
- 1...Sxd6
- 2.Sc3#
- 1...Sxc7
- 2.Sc3#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sd7!
- 1...Sxd6
- 1.d7?
- 1...Sxd7
- 2.Qxe4#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sd6
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sc7!
- 1...Sxd7
- 1.Ba7?
- Keys
- 1.Bc7!
- 1...Sxd6
- 2.Sc3#
- 2.Rxd6#
- 1...Sxc7
- 2.Sc3#
- 1...Sd7
- 2.Qxe4#
- 1...Sa3
- 2.Sc3#
- 1...Sc3
- 2.Sxc3#
- 1...Sd4
- 2.Sc3#
- 1...Sa7
- 2.Sc3#
- 1...Sb3
- 2.Qxe4#
- 1...Sd3
- 2.Qxe4#
- 1...Sa4
- 2.Qxe4#
- 1...Sa6
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sxd6
- 1.Bc7!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Tries
- Try
- B(I);
- Vars
- S(d);N_GUARD,P_SPINS(d),XP(H)::S(C)
- S(d);N_GUARD,XB(I)::S(C)
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Refutation
- S(e);
- Try
- B(L);
- Vars
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Refutation
- S(d);
- Try
- B(L);
- Vars
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- Refutation
- S(d);
- Try
- B(L);
- Vars
- S(d);N_GUARD,XP(H)::S(C)
- S(e);N_GUARD,XB(L)::QAB1(D),XP(c)
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Refutation
- S(d);
- Try
- B(L);
- Vars
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Refutation
- S(d);
- Try
- R(J);
- Vars
- S(d);N_GUARD,P_SPINS(d),XP(H)::S(C)
- S(d);N_GUARD,XR(J)::S(C)
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Refutation
- S(e);
- Try
- R(K);
- Vars
- S(e);N_GUARD,XR(K)::QAB1(D),XP(c)
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Refutation
- S(d);
- Try
- Q(D);
- Vars
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Refutation
- P(b);CHECK,N_SPINP(c)
- Try
- P(G);
- Vars
- S(d);N_GUARD,P_SPINS(d),XP(H)::S(C)
- S(d);N_GUARD,XP(G)::S(C)
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Refutation
- S(e);
- Try
- P(H);
- Vars
- S(e);N_GUARD,P_SPINS(e),XP(H)::QAB1(D),XP(c)
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
- S(e);N_GUARD::QAB1(D),XP(c)
- Refutation
- S(d);
- Try
- Actual
- B(I);
- Vars
- S(d);N_GUARD,XB(I)::S(C)
- S(e);N_GUARD::QAB1(D),XP(c)
- S(d);N_GUARD::S(C)
- S(d);N_GUARD::S(C),XS(d)
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).