MESON Chess Problem Database

Problem Display
PID: 186940 (b3B3/6bn/3B4/n1pkP3/6Q1/1p1PP3/1P4K1/3R4 w - - 0 1)

Bronowski, Jacob

Gibbins, Norman Martin

The Observer, 1933

(First published on Sun Nov 5 1933)

b3B3/6bn/3B4/n1pkP3/6Q1/1p1PP3/1P4K1/3R4

#2

9 + 7

15239 Valois Notebooks 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Bf6
      • 2.Qg8#
    • 1...Bh6
      • 2.Qg8#
    • 1...Bf8
      • 2.Qg8#
    • 1...Bh8
      • 2.Qg8#
    • 1...Bc6
      • 2.Bf7#
    • 1...Sc4
      • 2.Qxc4#
      • 2.dxc4#
    • 1...Sc6
      • 2.Bf7#
      • 2.Qc4#
    • 1...Sb7
      • 2.Qc4#
    • 1...c4
      • 2.dxc4#
  • Tries
    • 1.Bd7?
      • threat
        • 2.Qf3#
        • 2.Qe6#
        • 2.Qe4#
      • 1...Bxe5
        • 2.Qe6#
      • 1...Sf6
        • 2.Qe6#
      • 1...Sf8
        • 2.Qf3#
        • 2.Qe4#
      • 1...Sg5!
    • 1.Qd7?
      • threat
        • 2.Bc7#
        • 2.Bb8#
        • 2.Bf7#
        • 2.Qf7#
      • 1...Bxe5
        • 2.Bf7#
      • 1...Bf8
        • 2.Bf7#
        • 2.Qf7#
      • 1...Bc6
        • 2.Bf7#
        • 2.Qf7#
      • 1...Sc4
        • 2.Bf7#
        • 2.Qf7#
      • 1...Sb7
        • 2.Bf7#
        • 2.Qf7#
      • 1...Sg5
        • 2.Bc7#
        • 2.Bb8#
      • 1...Sf6
        • 2.Bf7#
        • 2.Qf7#
      • 1...c4
        • 2.Bf7#
        • 2.Qf7#
      • 1...Sf8!
  • Keys
    • 1.d4!
      • threat
        • 2.dxc5#
      • 1...Kc4+
        • 2.d5#
      • 1...Bxe5
        • 2.dxe5#
      • 1...cxd4
        • 2.Rxd4#
      • 1...Sc4
        • 2.e4#
      • 1...Sc6
        • 2.Bf7#
      • 1...c4
        • 2.e4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • B(e);OGATE::QAB(F)
    • B(g);SBLOCK::B(I)
    • S(b);N_GUARD::QAB1(F)
    • P(c);OGATE::R(A)+P(D)DCHECK,XP(c)
  • Tries
    • Try
      • B(I);
      • Threat
        • DUALS(3)
      • Vars
        • B(e);XP(G)::QAB1(F)
        • S(f);::QAB1(F)
      • Refutation
        • S(f);
    • Try
      • Q(F);
      • Threat
        • DUALS(4)
      • Vars
        • B(e);XP(G)::B(I)
      • Refutation
        • S(f);
  • Actual
    • P(D);
    • Threat
      • R(A)+P(D),XP(c)
    • Vars
      • K(d);CHECK,OGATE,S_FLIGHT::QAR(F)+P(D)
      • B(e);OGATE,XP(G)::R(A)+P(D),XB(e)
      • P(c);OGATE,P_SPINP(c),XP(D)::R1(A),XP(c)
      • S(b);SBLOCK::P(E)
      • S(b);SBLOCK::B(I)
      • P(c);SBLOCK::P(E)
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