MESON Chess Problem Database

Problem Display
PID: 24060 (4Q3/8/4R3/8/8/5Kb1/7p/5k1r w - - 0 1)

Speckmann, Werner

3rd HM., British Chess Magazine, 1973

4Q3/8/4R3/8/8/5Kb1/7p/5k1r

#2

3 + 4

2786 More Fun with Chess Miniatures 2000
133 The Problemist Supplement 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qb5#
    • 1...Be1
      • 2.Rxe1#
    • 1...Bf4
      • 2.Re1#
    • 1...Bd6
      • 2.Re1#
    • 1...Bc7
      • 2.Re1#
    • 1...Bb8
      • 2.Re1#
  • Tries
    • 1.Kxg3?
      • threat
        • 2.Re1#
      • 1...Kg1
        • 2.Re1#
      • 1...Rg1+!
    • 1.Rg6?
      • 1...Kg1
        • 2.Qe1#
      • 1...Bf2
        • 2.Qe2#
      • 1...Rg1
        • 2.Qe2#
      • 1...Be1
        • 2.Qb5#
        • 2.Qe2#
      • 1...Bf4
        • 2.Qe2#
      • 1...Bh4
        • 2.Qe2#
      • 1...Bd6
        • 2.Qe2#
      • 1...Bc7
        • 2.Qe2#
      • 1...Bb8
        • 2.Qe2#
      • 1...Be5!
  • Keys
    • 1.Qg6!
      • 1...Kg1
        • 2.Re1#
      • 1...Bf2
        • 2.Qg2#
      • 1...Rg1
        • 2.Qd3#
      • 1...Be1
        • 2.Qg2#
      • 1...Bf4
        • 2.Qg2#
      • 1...Bh4
        • 2.Qg2#
      • 1...Be5
        • 2.Qb1#
      • 1...Bd6
        • 2.Qb1#
        • 2.Qg2#
      • 1...Bc7
        • 2.Qb1#
        • 2.Qg2#
      • 1...Bb8
        • 2.Qb1#
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • R(b);SBLOCK::QAB(C)
    • B(d);N_GUARD::R1(B),XB(d)
    • B(d);N_GUARD::R1(B)
  • Tries
    • Try
      • K(A);P-FLIGHT,XB(d)
      • Threat
        • R1(B)
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • R(b);CHECK
    • Try
      • R(B);
      • Vars
        • K(a);P-FLIGHT,P_SPINB(d)::QAR2(C)
        • B(d);::QAB1(C)
        • R(b);SBLOCK::QAB1(C)
      • Refutation
        • B(d);
  • Actual
    • Q(C);
    • Vars
      • K(a);P-FLIGHT,P_SPINB(d)::R(B)
      • B(d);OGATE::QAB1(C)
      • R(b);SBLOCK::QAB(C)
      • B(d);N_GUARD::QAR(C)
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