MESON Chess Problem Database

Problem Display
PID: 18937 (2b1n2K/7p/nQ5r/4kN2/2P2RBr/8/1b4NB/8 w - - 0 1)

Retter, Yosef

3rd Prize, Problemisten, 1959-1960

2b1n2K/7p/nQ5r/4kN2/2P2RBr/8/1b4NB/8

#2

8 + 8

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Qxb2#
    • 1...Rf6
      • 2.Qe3#
    • 1...Be6
      • 2.Qxb2#
    • 1...Sf6
      • 2.Qd6#
  • Tries
    • 1.Sxh6?
      • threat
        • 2.Sf7#
      • 1...Be6
        • 2.Qxe6#
      • 1...Sd6
        • 2.Qxb2#
      • 1...Rxh6!
    • 1.Rf1+?
      • 1...Rxh2
        • 2.Re1#
      • 1...Ke4+!
    • 1.Rf2+?
      • 1...Rxh2
        • 2.Re2#
      • 1...Ke4+!
    • 1.Rf3+?
      • 1...Rxh2
        • 2.Re3#
      • 1...Ke4+!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Sf7#
      • 1...Rxd6
        • 2.Qe3#
      • 1...Sxd6
        • 2.Qxb2#
      • 1...Rf6
        • 2.Re4#
      • 1...Be6
        • 2.Rf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(e);SBLOCK::QAB(G),XB(a)
    • R(e);SBLOCK::QAR2(G)
    • B(g);SBLOCK::QAB(G),XB(a)
    • S(h);N_GUARD,S_CUTR(e)::QAB1(G)
  • Tries
    • Try
      • S(F);XR(e)
      • Threat
        • S(F)
      • Vars
        • B(g);N_GUARD::QAR1(G),XB(g)
        • S(h);SBLOCK::QAB(G),XB(a)
      • Refutation
        • R(b);XS(F)
    • Try
      • R(D);CHECK
      • Vars
        • R(b);XB(B)::R(D)
      • Refutation
        • K(c);CHECK,P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • R(b);XB(B)::R(D)
      • Refutation
        • K(c);CHECK,P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • R(b);XB(B)::R(D)
      • Refutation
        • K(c);CHECK,P-FLIGHT
  • Actual
    • S(F);
    • Threat
      • S(F)
    • Vars
      • R(e);SBLOCK,XS(F)::QAR2(G)
      • S(h);SBLOCK,XS(F)::QAB(G),XB(a)
      • R(e);SBLOCK::B(B)+R(D),DCHECK
      • B(g);SBLOCK::B(B)+R(D),DCHECK
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