MESON Chess Problem Database

Problem Display
PID: 210153 (1N2Nr2/4kPB1/1P2p3/4n3/B2R2p1/4Qp2/8/K7 w - - 0 1)

Beszczynski, Jan

Suomen Shakki, 1956

1N2Nr2/4kPB1/1P2p3/4n3/B2R2p1/4Qp2/8/K7

#2

9 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf7
      • 2.Qa3#
    • 1...Rxe8
      • 2.fxe8Q#
    • 1...Sd3
      • 2.Rd7#
    • 1...Sc4
      • 2.Rd7#
    • 1...Sc6
      • 2.Rd7#
    • 1...Sg6
      • 2.Rd7#
    • 1...Sd7
      • 2.Rxd7#
    • 1...Sxf7
      • 2.Bf6#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Qf6#
      • 1...Sd7
        • 2.Sc6#
        • 2.Rxd7#
      • 1...Rxf7!
    • 1.Qxf3?
      • threat
        • 2.Qf6#
      • 1...Rxf7
        • 2.Qa3#
      • 1...Sxf3
        • 2.Rd7#
      • 1...Sd7
        • 2.Sc6#
        • 2.Rxd7#
      • 1...gxf3!
    • 1.Qxe5?
      • threat
        • 2.Rd7#
        • 2.Qf6#
        • 2.Qc7#
      • 1...Rxf7
        • 2.Qd6#
        • 2.Qc7#
        • 2.Qc5#
      • 1...Kxf7!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qg5#
      • 1...Kd8
        • 2.Bf6#
        • 2.Qg5#
      • 1...Rxf7
        • 2.Sc8#
      • 1...Sxf7
        • 2.Sf5#
      • 1...Sd7
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • R(f);SBLOCK,XP(F)::QAB(B)
    • R(f);OGATE,XS(I)::PXR(f)=Q
    • S(c);N_GUARD,P_SPINP(d)::R1(D)
    • S(c);N_GUARD,P_SPINP(d)::R1(D),XS(c)
    • S(c);P_SPINP(d),SBLOCK,XP(F)::B(G)
  • Tries
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Refutation
        • R(f);XP(F)
    • Try
      • Q(B);XP(a)
      • Threat
        • QAB1(B)
      • Vars
        • R(f);SBLOCK,XP(F)::QAB(B)
        • S(c);N_GUARD,XQ(B)::R1(D)
      • Refutation
        • P(b);XQ(B)
    • Try
      • Q(B);P_PINP(d),XS(c)
      • Threat
        • DUALS(3)
      • Refutation
        • K(e);N_SPINP(d),P-FLIGHT,XP(F)
  • Actual
    • S(I);
    • Threat
      • QAB(B)
    • Vars
      • R(f);N_GUARD,SBLOCK,XP(F)::S(I)
      • S(c);P_SPINP(d),SBLOCK,XP(F)::S(I)
      • S(c);N_GUARD,P_SPINP(d),SBLOCK::S(H)
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