MESON Chess Problem Database
Problem Display
PID: 175169 (8/8/3p2p1/R1n2bR1/2rk3K/8/B2P1N2/7Q w - - 0 1)
Allen, JJ
San Francisco Chronicle, 1902
#2
7 + 6
| 6490 | yacpdb | 2018 |
SOLUTION
- SOUND
- Sets
- 1...Rc1
- 2.Qd5#
- 1...Rc2
- 2.Qd5#
- 1...Rc3
- 2.Qd5#
- 1...Ra4
- 2.Qd5#
- 2.Qa1#
- 1...Rb4
- 2.Qd5#
- 1...Bb1
- 2.Rd5#
- 2.Qd5#
- 1...Bc2
- 2.Rd5#
- 2.Qd5#
- 1...Bd3
- 2.Rd5#
- 2.Qd5#
- 1...Bh3
- 2.Rd5#
- 2.Qd5#
- 1...Bg4
- 2.Rd5#
- 2.Qd5#
- 1...Bd7
- 2.Rd5#
- 2.Qd5#
- 1...Bc8
- 2.Rd5#
- 2.Qd5#
- 1...Sb3
- 2.Rd5#
- 2.Qd5#
- 1...Sd3
- 2.Rd5#
- 2.Qd5#
- 1...Sa4
- 2.Rd5#
- 2.Qd5#
- 1...Sa6
- 2.Rd5#
- 2.Qd5#
- 1...Se6
- 2.Rd5#
- 2.Qd5#
- 1...Sb7
- 2.Rd5#
- 2.Qd5#
- 1...Sd7
- 2.Rd5#
- 2.Qd5#
- 1...Rc1
- Tries
- 1.Qf3?
- 1...Be4
- 2.Qe3#
- 2.Qf6#
- 1...Rc1
- 2.Qd5#
- 2.Qe3#
- 1...Rc2
- 2.Qd5#
- 2.Qe3#
- 1...Rc3
- 2.Qd5#
- 2.Qxc3#
- 1...Ra4
- 2.Qd5#
- 2.Qc3#
- 2.Qe3#
- 1...Rb4
- 2.Qd5#
- 2.Qc3#
- 2.Qe3#
- 1...Bb1
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 2.Qf6#
- 1...Bc2
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 2.Qf6#
- 1...Bd3
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 2.Qf6#
- 1...Bh3
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 2.Qf6#
- 1...Bg4
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 2.Qf6#
- 1...Be6
- 2.Qe3#
- 2.Qf6#
- 1...Bd7
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 2.Qf6#
- 1...Bc8
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 2.Qf6#
- 1...Sb3
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 1...Sd3
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 1...Sa4
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 1...Se4
- 2.Qd3#
- 2.Qe3#
- 1...Sa6
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 1...Se6
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 1...Sb7
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 1...Sd7
- 2.Rd5#
- 2.Qd5#
- 2.Qe3#
- 1...d5
- 2.Qe3#
- 1...Ke5+!
- 1...Be4
- 1.Qa8?
- 1...Be4
- 2.Qh8#
- 1...Rc1
- 2.Qd5#
- 2.Qh8#
- 1...Rc2
- 2.Qd5#
- 2.Qh8#
- 1...Rc3
- 2.Qd5#
- 2.Qh8#
- 1...Ra4
- 2.Qd5#
- 2.Qh8#
- 1...Rb4
- 2.Qd5#
- 2.Qh8#
- 1...Bb1
- 2.Rd5#
- 2.Qd5#
- 2.Qh8#
- 1...Bc2
- 2.Rd5#
- 2.Qd5#
- 2.Qh8#
- 1...Bd3
- 2.Rd5#
- 2.Qd5#
- 2.Qh8#
- 1...Bh3
- 2.Rd5#
- 2.Qd5#
- 2.Qh8#
- 1...Bg4
- 2.Rd5#
- 2.Qd5#
- 2.Qh8#
- 1...Be6
- 2.Qh8#
- 1...Bd7
- 2.Rd5#
- 2.Qd5#
- 2.Qh8#
- 1...Bc8
- 2.Rd5#
- 2.Qd5#
- 1...Sb3
- 2.Rd5#
- 2.Qd5#
- 2.Qh8#
- 1...Sd3
- 2.Rd5#
- 2.Qd5#
- 1...Sa4
- 2.Rd5#
- 2.Qd5#
- 2.Qh8#
- 1...Se4
- 2.Rd5#
- 2.Qd5#
- 1...Sa6
- 2.Rd5#
- 2.Qd5#
- 2.Qh8#
- 1...Se6
- 2.Rd5#
- 2.Qd5#
- 1...Sb7
- 2.Qh8#
- 1...Sd7
- 2.Rd5#
- 2.Qd5#
- 1...d5
- 2.Qh8#
- 1...Ke5+!
- 1...Be4
- 1.Qa1+?
- 1...Rc3
- 2.Qxc3#
- 1...Kd5+!
- 1...Rc3
- 1.Qf3?
- Keys
- 1.Qe1!
- 1...Kd5+
- 2.Qe4#
- 1...Be4
- 2.Qe3#
- 1...Rc1
- 2.Qe3#
- 1...Rc2
- 2.Qe3#
- 1...Rc3
- 2.dxc3#
- 1...Ra4
- 2.Qa1#
- 2.Qe3#
- 1...Rb4
- 2.Qe3#
- 1...Bb1
- 2.Qe3#
- 1...Bc2
- 2.Qe3#
- 1...Bd3
- 2.Qe3#
- 1...Bh3
- 2.Qe3#
- 1...Bg4
- 2.Qe3#
- 1...Be6
- 2.Qe3#
- 1...Bd7
- 2.Qe3#
- 1...Bc8
- 2.Qe3#
- 1...Sb3
- 2.Qe3#
- 1...Sd3
- 2.Qe3#
- 1...Sa4
- 2.Qe3#
- 1...Se4
- 2.Qe3#
- 1...Sa6
- 2.Qe3#
- 1...Se6
- 2.Qe3#
- 1...Sb7
- 2.Qe3#
- 1...Sd7
- 2.Qe3#
- 1...d5
- 2.Qe3#
- 1...Kd5+
- 1.Qe1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 4
- ADDED MATES = 19
- REMOVED MATES = 0
- Sets
- R(a);::QAR1(A)
- Tries
- Try
- Q(A);
- Vars
- P(e);SBLOCK::QAB1(A)
- Refutation
- K(b);CHECK,P_SPINB(d),P_SPINS(c),S_FLIGHT
- Try
- Q(A);
- Vars
- B(d);::QAB(A)
- S(c);::QAB(A)
- P(e);SBLOCK::QAB(A)
- Refutation
- K(b);CHECK,P_SPINB(d),P_SPINS(c),S_FLIGHT
- Try
- Q(A);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAB1(A),XR(a)
- Refutation
- K(b);CHECK,P-FLIGHT,P_SPINB(d),P_SPINR(a),P_SPINS(c)
- Try
- Actual
- Q(A);
- Vars
- K(b);CHECK,P-FLIGHT,P_SPINB(d),P_SPINR(a),P_SPINS(c)::QAB1(A)
- B(d);::QAB1(A)
- R(a);::QAB1(A)
- R(a);OGATE::P(C),XR(a)
- S(c);::QAB1(A)
- P(e);SBLOCK::QAB1(A)
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).