MESON Chess Problem Database
Problem Display
PID: 146838 (2K3k1/6B1/4R1P1/3BQq2/8/8/8/6R1 w - - 0 1)
Nietvelt, Gustaaf Josephus
Handelsblad, 1927
#2
7 + 2
| 20 | De Problemist | 1927 |
| 14868 | Pirnie Collection | 2013 |
SOLUTION
- SOUND
- Sets
- 1...Qb1
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.Re7#
- 2.Re8#
- 1...Qc2+
- 2.Rc6#
- 1...Qd3
- 2.Re8#
- 1...Qe4
- 2.Re8#
- 1...Qxe6+
- 2.Bxe6#
- 1...Qf1
- 2.Re8#
- 1...Qf2
- 2.Re8#
- 1...Qf3
- 2.Re8#
- 1...Qf4
- 2.Re8#
- 1...Qg5
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.Re7#
- 2.Re8#
- 1...Qh5
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.Re7#
- 2.Re8#
- 1...Qf7
- 2.Re8#
- 1...Qf8+
- 2.Re8#
- 1...Qb1
- Tries
- 1.Qc7?
- 1...Qxe6+
- 2.Bxe6#
- 1...Qf8+
- 2.Re8#
- 1...Qxd5
- 2.Re8#
- 2.Qf7#
- 1...Qf7
- 2.Qxf7#
- 1...Qb1
- 2.Ree1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.Rf6#
- 2.Re7#
- 2.Re8#
- 2.Qf7#
- 1...Qc2
- 2.Ree1#
- 2.Re2#
- 2.Re3#
- 2.Re4#
- 2.Re5#
- 2.Ra6#
- 2.Rb6#
- 2.Rc6#
- 2.Rd6#
- 2.Rf6#
- 2.Re7#
- 2.Re8#
- 1...Qd3
- 2.Re8#
- 2.Qf7#
- 1...Qh3
- 2.Qf7#
- 1...Qe4
- 2.Rxe4#
- 2.Re8#
- 2.Qf7#
- 1...Qg4
- 2.Qf7#
- 1...Qf1
- 2.Rf6#
- 2.Re8#
- 1...Qf2
- 2.Rf6#
- 2.Re8#
- 1...Qf3
- 2.Re8#
- 1...Qf4
- 2.Rf6#
- 2.Re8#
- 1...Qe5
- 2.Rxe5#
- 2.Re8#
- 2.Qf7#
- 1...Qg5
- 2.Re5#
- 2.Re8#
- 2.Qf7#
- 1...Qh5
- 2.Re5#
- 2.Re8#
- 2.Qf7#
- 1...Qf6
- 2.Rxf6#
- 2.Re8#
- 1...Qxg6!
- 1...Qxe6+
- 1.Qc7?
- Keys
- 1.Bh6!
- threat
- 2.Qg7#
- 1...Qc2+
- 2.Rc6#
- 1...Qxe6+
- 2.Bxe6#
- 1...Qf8+
- 2.Re8#
- 1...Qxg6
- 2.Re7#
- 1...Qxe5
- 2.Re8#
- 1...Qf6
- 2.Re8#
- 1...Qf7
- 2.Re8#
- threat
- 1.Bh6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 6
- Sets
- Q(a);CHECK,N_PINR(D)::B(B)+R(D)
- Q(a);N_PINR(D)::B(B)+R(D),DCHECK
- Q(a);CHECK,OGATE,P_SPINQ(a),XR(D)::B(B),XQ(a)
- Q(a);N_PINR(D)::R(D)
- Tries
- Try
- Q(C);
- Vars
- Q(a);CHECK,OGATE,P_SPINQ(a),XR(D)::B(B),XQ(a)
- Q(a);CHECK,N_PINR(D)::B(B)+R(D)
- Q(a);N_GUARD,N_PINR(D)::QAB1(C),XQ(a)
- Q(a);N_GUARD::QAB1(C)
- Q(a);N_PINR(D)::B(B)+R(D),DCHECK
- Refutation
- Q(a);N_PINR(D),XP(E)
- Try
- Actual
- B(F);
- Threat
- QAR1(C)
- Vars
- Q(a);CHECK,N_PINR(D)::B(B)+R(D)
- Q(a);CHECK,OGATE,P_SPINQ(a),XR(D)::B(B),XQ(a)
- Q(a);N_PINR(D),P_SPINQ(a),XP(E)::B(B)+R(D)
- Q(a);N_PINR(D),XQ(C)::B(B)+R(D),DCHECK
- Q(a);N_PINR(D)::B(B)+R(D),DCHECK
- Q(a);N_PINR(D)::R(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).