MESON Chess Problem Database
Problem Display
PID: 87630 (B7/5R2/1K1k1nN1/2Nb1P2/8/B3q3/8/1Q6 w - - 0 1)
Major, Montgomery
American Chess Problemist, 1950
#2
8 + 4
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.Se4#
- 2.Sb7#
- 1...Qd2
- 2.Se4#
- 2.Sb7#
- 1...Qf4
- 2.Se4#
- 2.Sb7#
- 1...Qxc5+
- 2.Bxc5#
- 1...Qg5
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Qh6
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Qe1
- 2.Se4#
- 2.Sb7#
- 1...Qe2
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Qb3+
- 2.Sxb3#
- 1...Qc3
- 2.Se4#
- 2.Sb7#
- 1...Qd3
- 2.Sb3#
- 2.Sxd3#
- 2.Se4#
- 2.Sb7#
- 1...Qf3
- 2.Sb3#
- 2.Sd3#
- 2.Se4#
- 2.Sb7#
- 1...Qg3
- 2.Sb3#
- 2.Sd3#
- 2.Se4#
- 2.Sb7#
- 1...Qh3
- 2.Sb3#
- 2.Sd3#
- 2.Se4#
- 2.Sb7#
- 1...Qe4
- 2.Sxe4#
- 2.Sb7#
- 1...Qe5
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Qe6
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Sxe6#
- 2.Sb7#
- 2.Sd7#
- 1...Qe8
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Se4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Be4
- 2.Rxf6#
- 1...Se4
- 2.Rd7#
- 1...Sg4
- 2.Rd7#
- 1...Sh5
- 2.Rd7#
- 1...Sd7+
- 2.Rxd7#
- 1...Sh7
- 2.Rd7#
- 1...Se8
- 2.Rd7#
- 1...Sg8
- 2.Rd7#
- 1...Qc1
- Keys
- 1.Qe4!
- 1...Qxc5+
- 2.Bxc5#
- 1...Qb3+
- 2.Sxb3#
- 1...Sd7+
- 2.Rxd7#
- 1...Qxa3
- 2.Qf4#
- 2.Qe5#
- 2.Qe7#
- 1...Qxe4
- 2.Sxe4#
- 2.Sb7#
- 1...Bxe4
- 2.Rxf6#
- 1...Bxf7
- 2.Qc6#
- 1...Bxa8
- 2.Rxf6#
- 1...Sxe4
- 2.Rd7#
- 1...Qc1
- 2.Sb7#
- 2.Qe5#
- 2.Qe7#
- 1...Qg1
- 2.Qf4#
- 2.Qe5#
- 2.Qe7#
- 1...Qd2
- 2.Sb7#
- 2.Qe5#
- 2.Qe7#
- 1...Qf2
- 2.Qe5#
- 2.Qe7#
- 1...Qd4
- 2.Qe7#
- 1...Qf4
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 2.Qxf4#
- 2.Qe7#
- 1...Qg5
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 2.Qe5#
- 2.Qe7#
- 1...Qh6
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 2.Qe5#
- 2.Qe7#
- 1...Qe1
- 2.Sb7#
- 1...Qe2
- 2.Sb3#
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Se6#
- 2.Sb7#
- 2.Sd7#
- 1...Qc3
- 2.Sb7#
- 2.Qe7#
- 1...Qd3
- 2.Sb3#
- 2.Sxd3#
- 2.Sb7#
- 2.Qf4#
- 2.Qe5#
- 2.Qe7#
- 1...Qf3
- 2.Sb3#
- 2.Sd3#
- 2.Sb7#
- 2.Qe5#
- 2.Qe7#
- 1...Qg3
- 2.Sb3#
- 2.Sd3#
- 2.Sb7#
- 2.Qe7#
- 1...Qh3
- 2.Sb3#
- 2.Sd3#
- 2.Sb7#
- 2.Qf4#
- 2.Qe5#
- 2.Qe7#
- 1...Ba2
- 2.Qc6#
- 1...Bb3
- 2.Qc6#
- 1...Bc4
- 2.Qc6#
- 1...Bc6
- 2.Rxf6#
- 2.Qxc6#
- 1...Be6
- 2.Qc6#
- 1...Bb7
- 2.Rxf6#
- 1...Sg4
- 2.Rd7#
- 2.Qxd5#
- 1...Sh5
- 2.Rd7#
- 2.Qxd5#
- 1...Sh7
- 2.Rd7#
- 2.Qxd5#
- 1...Se8
- 2.Rd7#
- 2.Qxd5#
- 1...Sg8
- 2.Rd7#
- 2.Qxd5#
- 1...Qxc5+
- 1.Qe4!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 9
- REMOVED MATES = 5
- Sets
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(C)::B(B),XQ(a)
- Q(a);CHECK,N_PINS(C)::B(B)+S(C),XQ(a)
- B(b);N_GUARD,S_CUTQ(a)::R(G),XS(d)
- S(d);N_GUARD::R1(G)
- S(d);CHECK,N_GUARD::R1(G),XS(d)
- Actual
- Q(A);
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XS(C)::B(B),XQ(a)
- Q(a);CHECK,N_PINS(C)::B(B)+S(C),XQ(a)
- S(d);CHECK,N_GUARD::R1(G),XS(d)
- B(b);N_GUARD,XQ(A)::R(G),XS(d)
- B(b);OGATE,XR(G)::QAR1(A)
- B(b);N_GUARD,XB(H)::R(G),XS(d)
- S(d);N_GUARD,XQ(A)::R1(G)
- Q(a);N_GUARD::QAB1(A)
- Q(a);N_PINS(C)::B(B)+S(C),DCHECK
- B(b);OGATE::QAR1(A)
- B(b);N_GUARD::R(G),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).