MESON Chess Problem Database
Problem Display
PID: 175211 (4b3/1Q2p1K1/N1n1k3/8/4p1P1/4P3/7B/8 w - - 0 1)
Johnson, Henry Sparks
Boston Sunday Post, 1902
#2
6 + 5
| 5454 | Near Snap | 2018 |
| 3713 | Snap | 2018 |
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Kd5
- 2.Qb3#
- 1...Bh5
- 2.Qxc6#
- 1...Bg6
- 2.Qxc6#
- 1...Bd7
- 2.Sc7#
- 2.Qb3#
- 1...Bf7
- 2.Qxc6#
- 1...Sb4
- 2.Sc5#
- 1...Sd4
- 2.Sc5#
- 1...Sa5
- 2.Sc5#
- 1...Sa7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Sd8
- 2.Sc5#
- 1...Kd5
- Tries
- 1.Bg3?
- 1...Kd5
- 2.Qb3#
- 1...Bd7
- 2.Sc7#
- 2.Qb3#
- 1...Bh5
- 2.Qxc6#
- 1...Bg6
- 2.Qxc6#
- 1...Bf7
- 2.Qxc6#
- 1...Sb4
- 2.Sc5#
- 1...Sd4
- 2.Sc5#
- 1...Sa5
- 2.Sc5#
- 1...Sa7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Sd8
- 2.Sc5#
- 1...Se5!
- 1...Kd5
- 1.Bf4?
- 1...Kd5
- 2.Qb3#
- 1...Bd7
- 2.Sc7#
- 2.Qb3#
- 1...Bh5
- 2.Qxc6#
- 1...Bg6
- 2.Qxc6#
- 1...Bf7
- 2.Qxc6#
- 1...Sb4
- 2.Sc5#
- 1...Sd4
- 2.Sc5#
- 1...Sa5
- 2.Sc5#
- 1...Sa7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Sd8
- 2.Sc5#
- 1...Se5!
- 1...Kd5
- 1.Bb8?
- 1...Kd5
- 2.Qb3#
- 1...Bd7
- 2.Qb3#
- 1...Bh5
- 2.Qxc6#
- 1...Bg6
- 2.Qxc6#
- 1...Bf7
- 2.Qxc6#
- 1...Sb4
- 2.Sc5#
- 1...Sd4
- 2.Sc5#
- 1...Sa5
- 2.Sc5#
- 1...Se5
- 2.Sc5#
- 1...Sa7
- 2.Sc5#
- 1...Sd8
- 2.Sc5#
- 1...Sxb8!
- 1...Kd5
- 1.Qc8+?
- 1...Bd7
- 2.Sc7#
- 2.Qg8#
- 1...Kd5!
- 1...Bd7
- 1.Qb6?
- 1...Kd5
- 2.Qb3#
- 1...Bh5
- 2.Qxc6#
- 1...Bg6
- 2.Qxc6#
- 1...Bd7
- 2.Sc7#
- 2.Qb3#
- 1...Bf7
- 2.Qxc6#
- 1...Kd7!
- 1...Kd5
- 1.Qd7+?
- 1...Bxd7
- 2.Sc7#
- 1...Kxd7!
- 1...Bxd7
- 1.Bg3?
- Keys
- 1.Bc7!
- 1...Kd5
- 2.Qb3#
- 1...Kd7
- 2.Sc5#
- 1...Bd7
- 2.Qb3#
- 1...Bh5
- 2.Qxc6#
- 1...Bg6
- 2.Qxc6#
- 1...Bf7
- 2.Qxc6#
- 1...Sb4
- 2.Sc5#
- 1...Sd4
- 2.Sc5#
- 1...Sa5
- 2.Sc5#
- 1...Se5
- 2.Sc5#
- 1...Sa7
- 2.Sc5#
- 1...Sb8
- 2.Sc5#
- 1...Sd8
- 2.Sc5#
- 1...Kd5
- 1.Bc7!
Anticipated by 4670(1886), 175656(1900)
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- K(c);P_SPINS(b),S_FLIGHT::QAB(E)
- B(e);N_GUARD::QAR2(E),XS(b)
- S(b);::S(D)
- Tries
- Try
- B(A);
- Vars
- K(c);P_SPINS(b),S_FLIGHT::QAB(E)
- B(e);N_GUARD::QAR2(E),XS(b)
- S(b);::S(D)
- Refutation
- S(b);
- Try
- B(A);
- Vars
- K(c);P_SPINS(b),S_FLIGHT::QAB(E)
- B(e);N_GUARD::QAR2(E),XS(b)
- S(b);::S(D)
- Refutation
- S(b);
- Try
- B(A);
- Vars
- K(c);P_SPINS(b),S_FLIGHT::QAB(E)
- B(e);SBLOCK::QAB(E)
- B(e);N_GUARD::QAR2(E),XS(b)
- S(b);::S(D)
- Refutation
- S(b);XB(A)
- Try
- Q(E);CHECK
- Refutation
- K(c);S_FLIGHT
- Try
- Q(E);P_PINS(b)
- Vars
- K(c);N_SPINS(b),S_FLIGHT::QAB(E)
- B(e);N_GUARD::QAR2(E),XS(b)
- Refutation
- K(c);N_SPINS(b),S_FLIGHT
- Try
- Q(E);CHECK
- Vars
- B(e);SBLOCK,XQ(E)::S(D)
- Refutation
- K(c);S_FLIGHT,XQ(E)
- Try
- Actual
- B(A);
- Vars
- K(c);P_SPINS(b),S_FLIGHT::QAB(E)
- K(c);S_FLIGHT::S(D)
- B(e);SBLOCK::QAB(E)
- B(e);N_GUARD::QAR2(E),XS(b)
- S(b);::S(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).