MESON Chess Problem Database
Problem Display
PID: 193906 (2r2b2/B2Q4/B1p3p1/7p/2b5/1p1R1p1K/3pk3/1n4R1 w - - 0 1)
O'Keefe, John James
Smith, William James
Brisbane Courier, 1916
#2
6 + 11
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Bxd3
- 2.Bxd3#
- 2.Qe6#
- 2.Qxd3#
- 1...Bd5
- 2.Rxd5#
- 1...Be6+
- 2.Qxe6#
- 1...Bf7
- 2.Rxd2#
- 2.Rd5#
- 1...Bg8
- 2.Rxd2#
- 2.Rd5#
- 1...Sa3
- 2.Rxd2#
- 1...Sc3
- 2.Rxd2#
- 1...f2
- 2.Re3#
- 1...Bxd3
- Tries
- 1.Qg4?
- threat
- 2.Qxf3#
- 2.Qe4#
- 1...Kxd3
- 2.Qxc4#
- 1...Bxd3
- 2.Qe6#
- 2.Qe4#
- 1...Bc5
- 2.Qxf3#
- 1...c5
- 2.Qxf3#
- 1...d1S
- 2.Qxf3#
- 1...Re8
- 2.Qxf3#
- 1...Bd5
- 2.Rxd5#
- 1...Be6
- 2.Rd5#
- 2.Qxe6#
- 1...Bh6
- 2.Qxf3#
- 1...Sc3
- 2.Qxf3#
- 1...hxg4+!
- threat
- 1.Qf5?
- threat
- 2.Qe4#
- 2.Qxf3#
- 1...Bxd3
- 2.Bxd3#
- 2.Qxd3#
- 2.Qe4#
- 2.Qe6#
- 2.Qe5#
- 1...Bc5
- 2.Qxf3#
- 1...c5
- 2.Qxf3#
- 1...d1S
- 2.Qxf3#
- 1...Re8
- 2.Qxf3#
- 1...Bd5
- 2.Rxd5#
- 1...Be6
- 2.Rd5#
- 2.Qxe6#
- 1...Bh6
- 2.Qxf3#
- 1...Sc3
- 2.Qxf3#
- 1...f2
- 2.Re3#
- 2.Qe4#
- 2.Qf3#
- 1...gxf5!
- threat
- 1.Qe6+?
- 1...Kxd3
- 2.Qxc4#
- 1...Bxe6+!
- 1...Kxd3
- 1.Qd5?
- threat
- 2.Qxf3#
- 2.Qe4#
- 1...Bxd3
- 2.Bxd3#
- 2.Qe4#
- 2.Qe6#
- 2.Qxd3#
- 2.Qe5#
- 1...Bxd5
- 2.Rxd5#
- 1...Bc5
- 2.Qxf3#
- 1...c5
- 2.Qxf3#
- 1...d1S
- 2.Qxf3#
- 1...Re8
- 2.Qxf3#
- 1...Bh6
- 2.Qxf3#
- 1...Sc3
- 2.Rxd2#
- 2.Qxf3#
- 1...f2
- 2.Re3#
- 2.Qf3#
- 2.Qe4#
- 1...cxd5!
- threat
- 1.Qg4?
- Keys
- 1.Qf7!
- threat
- 2.Qxf3#
- 1...Be6+
- 2.Qxe6#
- 1...Kxd3
- 2.Qxc4#
- 1...Bxd3
- 2.Qe6#
- 1...Bxf7
- 2.Rd5#
- 1...Bd5
- 2.Rxd5#
- 1...f2
- 2.Re3#
- 2.Qf3#
- threat
- 1.Qf7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 3
- Sets
- B(f);OGATEB::B(D)+R(B),XB(f)
- B(f);CHECK,N_GUARD::QAR(F),XB(f)
- S(a);N_GUARD::R1(B),XP(b)
- P(e);SBLOCK::R1(B)
- Tries
- Try
- Q(F);P_PINP(e)
- Threat
- DUALS(2)
- Vars
- K(c);N_SPINP(e),OGATEB,P_SPINB(f),S_FLIGHT,XR(B)::QAB1(F),XB(f)
- B(k);::QAB1(F),XP(e)
- P(h);::QAB1(F),XP(e)
- P(b);::QAB1(F),XP(e)
- R(j);::QAB1(F),XP(e)
- B(f);OGATEB::B(D)+R(B),XB(f)
- S(a);::QAB1(F),XP(e)
- Refutation
- P(g);CHECK,N_SPINP(e),XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- B(k);::QAB1(F),XP(e)
- P(h);::QAB1(F),XP(e)
- P(b);::QAB1(F),XP(e)
- R(j);::QAB1(F),XP(e)
- B(f);OGATEB::B(D)+R(B),XB(f)
- S(a);::QAB1(F),XP(e)
- Refutation
- P(i);XQ(F)
- Try
- Q(F);CHECK
- Vars
- K(c);OGATEB,P_SPINB(f),S_FLIGHT,XR(B)::QAB1(F),XB(f)
- Refutation
- B(f);CHECK,XQ(F)
- Try
- Q(F);
- Threat
- DUALS(2)
- Vars
- B(f);OGATE,XQ(F)::B(D)+R(B),XB(f)
- B(k);::QAB1(F),XP(e)
- P(h);::QAB1(F),XP(e)
- P(b);::QAB1(F),XP(e)
- R(j);::QAB1(F),XP(e)
- Refutation
- P(h);XQ(F)
- Try
- Actual
- Q(F);
- Threat
- QAB1(F),XP(e)
- Vars
- B(f);CHECK,N_GUARD::QAR(F),XB(f)
- K(c);OGATEB,P_SPINB(f),S_FLIGHT,XR(B)::QAB1(F),XB(f)
- B(f);N_GUARD,P_SPINB(f),XR(B)::QAR(F)
- B(f);OGATEB,XQ(F)::B(D)+R(B)
- B(f);OGATEB::B(D)+R(B),XB(f)
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).