MESON Chess Problem Database

Problem Display
PID: 230390 (2b2N2/Q1ppB3/1npr1p2/1Pk2K2/Bp2P3/1p2P3/1N6/8 w - - 0 1)

Caine, Walter Edmund

Sunday Chronicle, 1948

(First published on Sun Jul 4 1948)

2b2N2/Q1ppB3/1npr1p2/1Pk2K2/Bp2P3/1p2P3/1N6/8

#2

9 + 10

15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ba6
      • 2.Sxd7#
    • 1...Bb7
      • 2.Sxd7#
    • 1...cxb5
      • 2.Qxc7#
  • Tries
    • 1.Kf4?
      • 1...cxb5
        • 2.Qxc7#
      • 1...Ba6
        • 2.Sxd7#
      • 1...Bb7
        • 2.Sxd7#
      • 1...f5!
    • 1.Kg4?
      • 1...cxb5
        • 2.Qxc7#
      • 1...Ba6
        • 2.Sxd7#
      • 1...Bb7
        • 2.Sxd7#
      • 1...f5+!
    • 1.Kg6?
      • 1...cxb5
        • 2.Qxc7#
      • 1...Ba6
        • 2.Sxd7#
      • 1...Bb7
        • 2.Sxd7#
      • 1...f5+!
    • 1.Qxc7?
      • threat
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...Sc4
        • 2.Sd3#
      • 1...Sd5
        • 2.Bxd6#
      • 1...Sa8
        • 2.Bxd6#
      • 1...Sxa4!
    • 1.bxc6?
      • threat
        • 2.Qa5#
      • 1...Ba6
        • 2.Sxd7#
      • 1...dxc6+!
  • Keys
    • 1.Qa5!
      • threat
        • 2.bxc6#
      • 1...Sxa4
        • 2.b6#
      • 1...cxb5
        • 2.Qxb5#
      • 1...Ba6
        • 2.bxa6#
      • 1...Sc4
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = BLOCK_THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • B(j);N_GUARD::S(I),XP(i)
    • P(e);OGATEB,XP(E)::QAR2(G),XP(h)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Vars
        • P(e);OGATEB,XP(E)::QAR2(G),XP(h)
        • B(j);N_GUARD::S(I),XP(i)
      • Refutation
        • P(g);
    • Try
      • K(F);S_FLIGHT
      • Vars
        • P(e);OGATEB,XP(E)::QAR2(G),XP(h)
        • B(j);N_GUARD::S(I),XP(i)
      • Refutation
        • P(g);CHECK
    • Try
      • K(F);S_FLIGHT
      • Vars
        • P(e);OGATEB,XP(E)::QAR2(G),XP(h)
        • B(j);N_GUARD::S(I),XP(i)
      • Refutation
        • P(g);CHECK
    • Try
      • Q(G);N_PINS(d),P_PINP(e),XP(h)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);SBLOCK::S(A)
        • S(d);::B(H),XR(f)
      • Refutation
        • S(d);XB(C)
    • Try
      • P(E);XP(e)
      • Threat
        • QAR2(G)
      • Vars
        • B(j);N_GUARD::S(I),XP(i)
      • Refutation
        • P(i);CHECK,XP(E)
  • Actual
    • Q(G);N_PINS(d)
    • Threat
      • QAR(G)+P(E),XP(e)
    • Vars
      • S(d);OGATE,XB(C)::QAR(G)+P(E)
      • P(e);OGATE,P_SPINP(e),XP(E)::QAR1(G),XP(e)
      • B(j);OGATE::QAR(G)+P(E),XB(j)
      • S(d);SBLOCK::S(A)
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