MESON Chess Problem Database

Problem Display
PID: 18752 (2BK1B2/2P5/8/3k4/P1n4N/1R3N2/2P4Q/8 w - - 0 1)

Retter, Yosef

2/3 Prize, Banska Bystrica (BABY) TT, 1958

2BK1B2/2P5/8/3k4/P1n4N/1R3N2/2P4Q/8

#2

10 + 2

3976 FIDE Album (1956-1958) 1961
3147 Chess Problems: Introduction to an Art 1963
3841 The Art of Israeli Chess Composition 1983
721 Variantim 1988
5395 Schach fur Nussknacker 1994
3310 2345 Chess Problems 1997
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Bb7#
    • 1...Kc6
      • 2.Bb7#
  • Tries
    • 1.Rd3+?
      • 1...Ke4
        • 2.Sg5#
        • 2.Bf5#
        • 2.Bb7#
      • 1...Kc6!
    • 1.Rb4?
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6
        • 2.Bb7#
      • 1...Sb2
        • 2.Qd6#
      • 1...Sd2
        • 2.Qd6#
      • 1...Sa3
        • 2.Qd6#
      • 1...Se3
        • 2.Qd6#
      • 1...Sa5
        • 2.Qd6#
      • 1...Sb6
        • 2.Qd6#
      • 1...Sd6
        • 2.Qxd6#
      • 1...Se5!
    • 1.Rb5+?
      • 1...Kc6
        • 2.Sd4#
        • 2.Bb7#
        • 2.Bd7#
      • 1...Ke4!
    • 1.Qe5+?
      • 1...Kc6
        • 2.Sd4#
        • 2.Bb7#
        • 2.Bd7#
        • 2.Qe4#
        • 2.Qb5#
        • 2.Qc5#
      • 1...Sxe5!
    • 1.Qd6+?
      • 1...Ke4
        • 2.Sg5#
        • 2.Bf5#
        • 2.Bb7#
        • 2.Qd4#
      • 1...Sxd6!
    • 1.Qd2+?
      • 1...Ke4
        • 2.Bf5#
        • 2.Bb7#
        • 2.Qd4#
      • 1...Kc6
        • 2.Bb7#
        • 2.Bd7#
        • 2.Qd7#
      • 1...Sxd2!
  • Keys
    • 1.Rc3!
      • 1...Ke4
        • 2.Bb7#
      • 1...Kc6
        • 2.Qd6#
      • 1...Sb2
        • 2.Qe5#
      • 1...Sd2
        • 2.Qe5#
      • 1...Sa3
        • 2.Qe5#
      • 1...Se3
        • 2.Qe5#
      • 1...Sa5
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sb6
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#

This anticipates 229400(2004)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::B(H)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);
      • Vars
        • K(b);P_SPINS(a),S_FLIGHT::QAR1(B)
        • K(b);S_FLIGHT::B(H)
        • S(a);N_GUARD::QAR1(B)
        • S(a);N_GUARD::QAR1(B),XS(a)
      • Refutation
        • S(a);
    • Try
      • R(C);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • S(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • S(a);XQ(B)
  • Actual
    • R(C);
    • Vars
      • K(b);S_FLIGHT::B(H)
      • K(b);P_SPINS(a),S_FLIGHT::QAR1(B)
      • S(a);N_GUARD::QAR1(B)
      • S(a);N_GUARD::QAR1(B),XS(a)
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