MESON Chess Problem Database

Problem Display
PID: 17685 (4Q3/B4N2/p2p4/3k1bR1/1p3n1r/1P4nq/K1N3rp/R6B w - - 0 1)

Dyummel, Fridrik

Shakhmaty v SSSR, 1948

4Q3/B4N2/p2p4/3k1bR1/1p3n1r/1P4nq/K1N3rp/R6B

#2

9 + 11

3147 Chess Problems: Introduction to an Art 1963
133 The Problemist Supplement 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Sge2
      • 2.Sxb4#
    • 1...Sfe2
      • 2.Se3#
    • 1...Se6
      • 2.Qa8#
  • Tries
    • 1.Re1?
      • threat
        • 2.Qa8#
      • 1...Sge2
        • 2.Sxb4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sfe2
        • 2.Se3#
      • 1...Rh8!
  • Keys
    • 1.Kb1!
      • threat
        • 2.Ra5#
      • 1...Se6
        • 2.Qa8#
      • 1...Se4
        • 2.Sxb4#
      • 1...Sd3
        • 2.Se3#
      • 1...a5
        • 2.Rxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • S(c);N_PINS(D)::S(D),XP(e)
    • S(f);N_PINS(D)::S(D)
    • S(f);SBLOCK::QAB(I)
  • Tries
    • Try
      • R(A);
      • Threat
        • QAB(I)
      • Vars
        • S(c);N_PINS(D)::S(D),XP(e)
        • S(c);N_GUARD,N_SPINR(a)::QAB1(I),XS(c)
        • S(f);N_PINS(D)::S(D)
      • Refutation
        • R(g);
  • Actual
    • K(C);S_FLIGHT
    • Threat
      • R(A)
    • Vars
      • S(f);SBLOCK::QAB(I)
      • S(c);N_PINS(D),N_SPINR(a)::S(D),XP(e)
      • S(f);N_PINS(D)::S(D)
      • P(j);::R(A),XP(j)
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