MESON Chess Problem Database

Problem Display
PID: 201388 (8/2ppQ3/PkNB4/1P3R2/pp6/q3N2K/2P5/8 w - - 0 1)

ten Cate, Pieter

Western Morning News, 1922

(First published on Sat Dec 16 1922)

8/2ppQ3/PkNB4/1P3R2/pp6/q3N2K/2P5/8

#2

9 + 6

6490 yacpdb 2020
15239 Valois Notebooks 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qc1
      • 2.Sc4#
    • 1...Qb2
      • 2.Sc4#
    • 1...Qa1
      • 2.Sc4#
    • 1...Qxe3+
      • 2.Qxe3#
    • 1...b3
      • 2.Sc4#
    • 1...cxd6
      • 2.Qd8#
    • 1...dxc6
      • 2.Qxc7#
  • Tries
    • 1.Qd8?
      • threat
        • 2.Bxc7#
        • 2.Qxc7#
        • 2.Qb8#
      • 1...dxc6
        • 2.Qxc7#
      • 1...Qxe3+!
    • 1.Qxd7?
      • threat
        • 2.Bxc7#
        • 2.Qxc7#
      • 1...cxd6
        • 2.Qa7#
        • 2.Qb7#
        • 2.Qd8#
      • 1...Qxe3+!
    • 1.Qe8?
      • threat
        • 2.Qb8#
      • 1...Qxe3+
        • 2.Qxe3#
      • 1...dxc6!
  • Keys
    • 1.c4!
      • threat
        • 2.Bc5#
      • 1...Qxe3+
        • 2.Qxe3#
      • 1...cxd6
        • 2.Qd8#
      • 1...dxc6
        • 2.Qxc7#
      • 1...bxc4 ep
        • 2.Sc4#
      • 1...b3
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • Q(a);N_PINS(B)::S(B)
    • Q(a);CHECK,OGATE,XS(B)::QAB(I),XQ(a)
    • P(c);N_PINS(B)::S(B)
    • P(e);OGATEB,XB(H)::QAB(I)
    • P(f);OGATE,XS(G)::QAB1(I),XP(e)
  • Tries
    • Try
      • Q(I);P_PINP(e)
      • Threat
        • DUALS(3)
      • Vars
        • P(f);XS(G)::QAB1(I),XP(e)
      • Refutation
        • Q(a);CHECK,XS(B)
    • Try
      • Q(I);XP(f)
      • Threat
        • DUALS(2)
      • Refutation
        • Q(a);CHECK,XS(B)
    • Try
      • Q(I);
      • Threat
        • QAR2(I)
      • Vars
        • Q(a);CHECK,OGATE,XS(B)::QAB(I),XQ(a)
      • Refutation
        • P(f);XS(G)
  • Actual
    • P(A);
    • Threat
      • B(H)
    • Vars
      • Q(a);CHECK,OGATE,XS(B)::QAB(I),XQ(a)
      • P(e);OGATEB,XB(H)::QAB(I)
      • P(f);OGATE,XS(G)::QAB1(I),XP(e)
      • P(c);EP,N_PINS(B),XP(A)::S(B)
      • P(c);N_PINS(B)::S(B)
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