MESON Chess Problem Database

Problem Display
PID: 259244 (K7/5Q2/7p/R7/3Rp2n/2b1kb1N/8/5B2 w - - 0 1)

Pirrone, Santi

Arbejder-Skak, 1959

K7/5Q2/7p/R7/3Rp2n/2b1kb1N/8/5B2

#2

6 + 6

15601 Albrecht-Leiss-Degener Collection 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Qa7#
    • 1...Bxd4
      • 2.Qf4#
    • 1...Bd1
      • 2.Qf2#
    • 1...Bh1
      • 2.Qf2#
    • 1...Be2
      • 2.Qf2#
    • 1...Bg2
      • 2.Qf2#
    • 1...Bg4
      • 2.Qf2#
    • 1...Bh5
      • 2.Qf2#
  • Tries
    • 1.Re5?
      • threat
        • 2.Rd3#
      • 1...Bxd4
        • 2.Qf4#
      • 1...Be2
        • 2.Rexe4#
        • 2.Qf2#
      • 1...Kxd4!
    • 1.Qb3?
      • threat
        • 2.Qxc3#
      • 1...Kxd4
        • 2.Qb6#
      • 1...Be2!
    • 1.Qe7?
      • threat
        • 2.Rd3#
      • 1...Kxd4
        • 2.Qc5#
        • 2.Qa7#
      • 1...Be2
        • 2.Qxe4#
      • 1...Bxd4!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Rd3#
      • 1...Kxd4
        • 2.Qb6#
      • 1...Bxd4
        • 2.Qxh6#
      • 1...Be2
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • K(b);OGATEB,S_FLIGHT,XR(C)::QAB(E)
    • B(a);SBLOCK,XR(C)::QAB1(E)
    • B(c);OGATE::QAB1(E)
  • Tries
    • Try
      • R(D);P_PINP(d)
      • Threat
        • R1(C)
      • Vars
        • B(a);SBLOCK,XR(C)::QAB1(E)
      • Refutation
        • K(b);N_SPINP(d),S_FLIGHT,XR(C)
    • Try
      • Q(E);P_PINB(a)
      • Threat
        • QAR2(E),XB(a)
      • Vars
        • K(b);N_SPINB(a),OGATEB,S_FLIGHT,XR(C)::QAB(E)
      • Refutation
        • B(c);
    • Try
      • Q(E);P_PINP(d)
      • Threat
        • R1(C)
      • Vars
        • B(c);N_GUARD::QAR1(E),XP(d)
      • Refutation
        • B(a);XR(C)
  • Actual
    • Q(E);P_PINP(d)
    • Threat
      • R1(C)
    • Vars
      • K(b);N_SPINP(d),OGATEB,S_FLIGHT,XR(C)::QAB(E)
      • B(a);SBLOCK,XR(C)::QAB(E),XP(f)
      • B(c);N_GUARD::QAR1(E),XP(d)
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