MESON Chess Problem Database
Problem Display
PID: 202493 (4NbBr/3p1P1p/1pn1kB1P/3p3R/3R2p1/2p3P1/2N1KP2/Q7 w - - 0 1)
Polak, HA
Het Oosterpark, 1923
#2
12 + 10
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Ba3
- 2.f8S#
- 1...Bb4
- 2.f8S#
- 1...Bc5
- 2.f8S#
- 1...Bd6
- 2.f8S#
- 1...Bxh6
- 2.f8S#
- 1...Be7
- 2.f8S#
- 1...Bg7
- 2.f8S#
- 1...Sb4
- 2.Re5#
- 1...Sxd4+
- 2.Sxd4#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa7
- 2.Re5#
- 1...Se7
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sd8
- 2.Re5#
- 1...Rxg8
- Tries
- 1.Re4+?
- 1...Se5
- 2.Sd4#
- 2.Rexe5#
- 2.Rhxe5#
- 1...dxe4!
- 1...Se5
- 1.Qh1?
- threat
- 2.Qxd5#
- 1...Sxd4+
- 2.Sxd4#
- 1...Sb4
- 2.Re5#
- 1...Se7
- 2.Re5#
- 1...d6!
- threat
- 1.Qa2?
- threat
- 2.Qxd5#
- 1...Sxd4+
- 2.Sxd4#
- 1...Sb4
- 2.Re4#
- 2.Re5#
- 1...Se7
- 2.Re4#
- 2.Re5#
- 1...d6!
- threat
- 1.Qa8?
- 1...Sxd4+
- 2.Sxd4#
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bxh6
- 2.f8S#
- 1...d6
- 2.Qc8#
- 1...Ba3
- 2.f8S#
- 1...Bb4
- 2.f8S#
- 1...Bc5
- 2.f8S#
- 1...Bd6
- 2.f8S#
- 1...Be7
- 2.f8S#
- 1...Bg7
- 2.f8S#
- 1...Sb4
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 2.Qxd5#
- 1...Se5
- 2.Rxe5#
- 2.Qxd5#
- 1...Sa7
- 2.Re5#
- 2.Qxd5#
- 1...Se7
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 2.Qxd5#
- 1...Sd8
- 2.Re5#
- 2.Qxd5#
- 1...b5!
- 1...Sxd4+
- 1.Re4+?
- Keys
- 1.Qa6!
- 1...Sxd4+
- 2.Sxd4#
- 1...Rxg8
- 2.fxg8Q#
- 2.fxg8B#
- 1...Bxh6
- 2.f8S#
- 1...d6
- 2.Qc8#
- 1...b5
- 2.Re5#
- 1...Ba3
- 2.f8S#
- 1...Bb4
- 2.f8S#
- 1...Bc5
- 2.f8S#
- 1...Bd6
- 2.f8S#
- 1...Be7
- 2.f8S#
- 1...Bg7
- 2.f8S#
- 1...Sb4
- 2.Re5#
- 1...Sa5
- 2.Re5#
- 1...Se5
- 2.Rxe5#
- 1...Sa7
- 2.Re5#
- 1...Se7
- 2.Re5#
- 1...Sb8
- 2.Re5#
- 1...Sd8
- 2.Re5#
- 1...Sxd4+
- 1.Qa6!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- R(j);OGATE,XB(L)::PXR(j)=Q
- B(i);OGATE::P=S
- B(i);OGATE,XP(I)::P=S
- S(e);N_GUARD::R1(G)
- S(e);CHECK,XR(F)::S(B),XS(e)
- S(e);N_GUARD::R1(G),XS(e)
- Tries
- Try
- R(F);CHECK
- Refutation
- P(c);XR(F)
- Try
- Q(A);
- Threat
- QAB1(A),XP(c)
- Vars
- S(e);CHECK,XR(F)::S(B),XS(e)
- S(e);N_GUARD::R1(G)
- Refutation
- P(g);
- Try
- Q(A);P_PINP(c)
- Threat
- QAB1(A),XP(c)
- Vars
- S(e);CHECK,XR(F)::S(B),XS(e)
- Refutation
- P(g);
- Try
- Q(A);
- Vars
- S(e);CHECK,XR(F)::S(B),XS(e)
- R(j);OGATE,XB(L)::PXR(j)=Q
- B(i);OGATE,XP(I)::P=S
- P(g);OGATEB::QAB(A)
- B(i);OGATE::P=S
- S(e);N_GUARD::R1(G)
- Refutation
- P(d);
- Try
- Actual
- Q(A);
- Vars
- S(e);CHECK,P_SPINP(d),XR(F)::S(B),XS(e)
- R(j);OGATE,XB(L)::PXR(j)=Q
- B(i);OGATE,XP(I)::P=S
- P(g);OGATEB::QAB(A)
- P(d);P_SPINS(e)::R1(G)
- B(i);OGATE::P=S
- S(e);N_GUARD,P_SPINP(d)::R1(G)
- S(e);N_GUARD,P_SPINP(d)::R1(G),XS(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).