MESON Chess Problem Database

Problem Display
PID: 84960 (8/1K2p1r1/4B1qR/1nr1kP2/R1p1N1pP/B7/5N2/4Q3 w - - 0 1)

Petite, Efren

Boletim da UBP, 1965

8/1K2p1r1/4B1qR/1nr1kP2/R1p1N1pP/B7/5N2/4Q3

#2

10 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Sd3#
  • Tries
    • 1.Sd3+?
      • 1...cxd3
        • 2.Qg3#
      • 1...Kd4!
    • 1.Sxc5+?
      • 1...Kd4
        • 2.Sb3#
        • 2.Rxc4#
      • 1...Kd6
        • 2.Ra6#
      • 1...Kf6
        • 2.Sxg4#
        • 2.Sd7#
      • 1...Kf4!
    • 1.Sg5+?
      • 1...Kf4
        • 2.Sd3#
      • 1...Kd6
        • 2.Ra6#
      • 1...Kf6
        • 2.Sxg4#
      • 1...Kd4!
    • 1.Qc3+?
      • 1...Kf4
        • 2.Bc1#
        • 2.Qg3#
      • 1...Sd4
        • 2.Qg3#
      • 1...Sxc3!
  • Keys
    • 1.Sd2+!
      • 1...Kd4
        • 2.Sb3#
      • 1...Kf4
        • 2.Sd3#
      • 1...Kd6
        • 2.Sxc4#
        • 2.Ra6#
      • 1...Kf6
        • 2.Sxg4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(a);N_GUARD::S(B)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • P(a);XS(B)::QAB(A)
      • Refutation
        • K(e);P_SPINP(a),S_FLIGHT
    • Try
      • S(E);CHECK,XR(d)
      • Vars
        • K(e);S_FLIGHT::R(D)
      • Refutation
        • K(e);P_SPINP(a),S_FLIGHT
    • Try
      • S(E);CHECK
      • Vars
        • K(e);P_SPINP(a),S_FLIGHT::S(B)
        • K(e);P_SPINR(d),S_FLIGHT::R(D)
        • K(e);P_SPINQ(f),S_FLIGHT::S(B),XP(b)
      • Refutation
        • K(e);P_SPINP(a),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);P_SPINS(c),SBLOCK::QAB(A)
      • Refutation
        • S(c);XQ(A)
  • Actual
    • S(E);CHECK
    • Vars
      • K(e);P_SPINP(a),S_FLIGHT::S(E)
      • K(e);P_SPINP(a),S_FLIGHT::S(B)
      • K(e);P_SPINQ(f),S_FLIGHT::S(B),XP(b)
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