MESON Chess Problem Database

Problem Display
PID: 21985 (1q2R3/1n5b/1b5Q/4p3/4p1N1/2p4N/2BPkpP1/2KR4 w - - 0 1)

ten Cate, Pieter

2nd Prize, Western Morning News and Mercury, 1922/I

(First published on Sat Apr 22 1922)

1q2R3/1n5b/1b5Q/4p3/4p1N1/2p4N/2BPkpP1/2KR4

#2

9 + 9

15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qxe3#
      • 2.Qa6#
    • 1...Bd4
      • 2.Qa6#
    • 1...Ba5
      • 2.Qe3#
      • 2.Qa6#
    • 1...Bc5
      • 2.Qa6#
    • 1...Ba7
      • 2.Qa6#
    • 1...Bc7
      • 2.Qe3#
      • 2.Qa6#
    • 1...Bd8
      • 2.Qe3#
      • 2.Qa6#
    • 1...Sc5
      • 2.Qe3#
    • 1...cxd2+
      • 2.Qxd2#
  • Tries
    • 1.Bd3+?
      • 1...exd3
        • 2.Sf4#
      • 1...Kxd3!
  • Keys
    • 1.d4!
      • threat
        • 2.Qe3#
      • 1...Bxd4
        • 2.Qa6#
      • 1...exd4
        • 2.Bd3#
      • 1...exd4 ep
        • 2.Sf4#
      • 1...f1S
        • 2.Sg1#
      • 1...e3
        • 2.Qxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • B(f);OGATE::QAB(H)
    • S(g);S_CUTB(f)::QAR1(H)
    • P(c);CHECK,OGATE,XP(D)::QAR1(H),XP(c)
  • Tries
    • Try
      • B(C);CHECK
      • Vars
        • P(d);P_SPINP(e),XB(C)::S(F)
      • Refutation
        • K(a);S_FLIGHT,XB(C)
  • Actual
    • P(D);
    • Threat
      • QAR1(H)
    • Vars
      • B(f);OGATE,XP(D)::QAB(H)
      • P(e);P_SPINP(d),XP(D)::B(C)
      • P(d);EP,P_SPINP(e),XP(D)::S(F)
      • P(b);N_GUARD::S(F)
      • P(d);::QAR1(H),XP(d)
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