MESON Chess Problem Database

Problem Display
PID: 203437 (4k3/1N5R/3B1pP1/2P5/8/1p6/2q1B2K/4R3 w - - 0 1)

ten Cate, Pieter

Australasian (The), 1924

4k3/1N5R/3B1pP1/2P5/8/1p6/2q1B2K/4R3

#2

8 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Bb5#
    • 1...Qd1
      • 2.Bxd1#
      • 2.Bb5#
    • 1...Qd3
      • 2.Bxd3#
    • 1...Qe4
      • 2.Bb5#
    • 1...Qf5
      • 2.Bb5#
    • 1...Qxg6
      • 2.Bb5#
      • 2.Bh5#
    • 1...Qc1
      • 2.Bb5#
    • 1...Qxe2+
      • 2.Rxe2#
    • 1...Qc3
      • 2.Bb5#
    • 1...Qc4
      • 2.Bxc4#
    • 1...Qxc5
      • 2.Bb5#
  • Tries
    • 1.Kh1?
      • threat
        • 2.Bb5#
      • 1...Qxe2
        • 2.Rxe2#
      • 1...Qd3
        • 2.Bxd3#
      • 1...Qc4
        • 2.Bxc4#
      • 1...Qe4+!
  • Keys
    • 1.c6!
      • threat
        • 2.Rh8#
      • 1...Qxe2+
        • 2.Rxe2#
      • 1...Qxg6
        • 2.Bh5#
      • 1...Qxc6
        • 2.Bb5#
      • 1...Qc4
        • 2.Bxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • Q(a);N_PINB(B)::R(A)+B(B),DCHECK
    • Q(a);N_PINB(B)::R(A)+B(B),XQ(a)
    • Q(a);N_PINB(B)::B(B)
    • Q(a);CHECK,OGATE,P_SPINQ(a),XB(B)::R(A),XQ(a)
    • Q(a);N_PINB(B),XP(D)::R(A)+B(B),DCHECK
  • Tries
    • Try
      • K(C);N_SPINB(B),P-FLIGHT
      • Threat
        • R(A)+B(B),DCHECK
      • Vars
        • Q(a);OGATE,P_SPINQ(a),XB(B)::R(A),XQ(a)
        • Q(a);N_GUARD::R(A)+B(B),XQ(a)
      • Refutation
        • Q(a);CHECK
  • Actual
    • P(D);
    • Threat
      • R(H)
    • Vars
      • Q(a);CHECK,OGATE,P_SPINQ(a),XB(B)::R(A),XQ(a)
      • Q(a);N_PINB(B),XP(F)::R(A)+B(B)
      • Q(a);N_PINB(B),XP(D)::R(A)+B(B)
      • Q(a);N_PINB(B)::R(A)+B(B),XQ(a)
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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).