MESON Chess Problem Database

Problem Display
PID: 42640 (5K2/bQ2p3/p3pp2/N1k1nR2/P7/3R4/n7/7B w - - 0 1)

Retter, Yosef

3rd Prize, Peris MT, 1961

5K2/bQ2p3/p3pp2/N1k1nR2/P7/3R4/n7/7B

#2

7 + 8

3749 FIDE Album (1959-1961) 1966
3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Bb6
      • 2.Qxe7#
    • 1...Sb4
      • 2.Qxa7#
    • 1...exf5
      • 2.Rd5#
  • Tries
    • 1.Rd4?
      • threat
        • 2.Sb3#
        • 2.Qxa7#
      • 1...Bb8
        • 2.Sb3#
      • 1...Bb6
        • 2.Sb3#
      • 1...Sc1
        • 2.Qb4#
        • 2.Qxa7#
      • 1...Kxd4!
    • 1.Qxa6?
      • threat
        • 2.Qb5#
      • 1...Kb4
        • 2.Qb5#
      • 1...Sc3!
  • Keys
    • 1.Rb3!
      • 1...Kd4
        • 2.Qxa7#
      • 1...Kd6
        • 2.Qxe7#
      • 1...exf5
        • 2.Qd5#
      • 1...Bb8
        • 2.Qb6#
      • 1...Bb6
        • 2.Qxb6#
      • 1...Sc1
        • 2.Qb4#
      • 1...Sc3
        • 2.Qb4#
      • 1...Sb4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • B(g);SBLOCK::QAB(F),XP(h)
    • S(a);SBLOCK::QAB(F),XB(g)
    • P(e);N_GUARD,N_SPINS(c),XR(E)::R1(B)
  • Tries
    • Try
      • R(B);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);::S(D)
      • Refutation
        • K(b);N_SPINS(c),S_FLIGHT,XR(B)
    • Try
      • Q(F);XP(d)
      • Threat
        • QAR1(F)
      • Vars
        • K(b);N_SPINS(c),S_FLIGHT::QAR1(F)
      • Refutation
        • S(a);
  • Actual
    • R(B);
    • Vars
      • K(b);N_SPINS(c),S_FLIGHT::QAB(F),XB(g)
      • K(b);N_SPINS(c),S_FLIGHT::QAB1(F),XP(h)
      • P(e);N_GUARD,N_SPINS(c),XR(E)::QAR1(F)
      • B(g);N_GUARD::QAB1(F)
      • B(g);N_GUARD::QAB1(F),XB(g)
      • S(a);N_GUARD::QAB1(F)
      • S(a);N_GUARD::QAB1(F),XS(a)
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