MESON Chess Problem Database

Problem Display
PID: 18368 (n7/8/R1b3p1/2Q3n1/1NRNPkr1/7P/3Ppr1P/K3B3 w - - 0 1)

Retter, Yosef

4th HM., Israel Ring Ty., 1955

n7/8/R1b3p1/2Q3n1/1NRNPkr1/7P/3Ppr1P/K3B3

#2

11 + 8

3841 The Art of Israeli Chess Composition 1983

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Sxe2#
    • 1...Bxe4
      • 2.Qd6#
    • 1...Sf3
      • 2.Se6#
    • 1...Sxe4
      • 2.Sd3#
  • Tries
    • 1.Sxe2+?
      • 1...Kf3
        • 2.Qxf2#
      • 1...Rxe2!
    • 1.Se6+?
      • 1...Kf3
        • 2.Qxf2#
      • 1...Sxe6!
  • Keys
    • 1.Sf3!
      • threat
        • 2.Qe3#
      • 1...Kxf3
        • 2.Qxf2#
      • 1...Rxf3
        • 2.Qd6#
      • 1...Bxe4
        • 2.Rf6#
      • 1...Sxf3
        • 2.Sd3#
      • 1...Sxe4
        • 2.Qf8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 4
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(b);N_GUARD,SBLOCK::S(H),XP(a)
    • B(f);SBLOCK,XP(I)::QAB(J)
    • S(e);N_GUARD,SBLOCK::S(H)
    • S(e);SBLOCK,XP(I)::S(F)
  • Tries
    • Try
      • S(H);CHECK,XP(a)
      • Vars
        • K(c);P-FLIGHT::QAR1(J),XR(b)
      • Refutation
        • R(b);XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR1(J),XR(b)
      • Refutation
        • S(e);XS(H)
  • Actual
    • S(H);
    • Threat
      • QAB1(J)
    • Vars
      • K(c);OGATEB,P-FLIGHT,XS(H)::QAR1(J),XR(b)
      • R(b);SBLOCK,XS(H)::QAB(J)
      • B(f);OGATE,P_SPINB(f),XP(I)::R(K)
      • S(e);SBLOCK,XS(H)::S(F)
      • S(e);N_GUARD,P_SPINS(e),XP(I)::QAR(J)
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