MESON Chess Problem Database

Problem Display
PID: 103781 (R7/B2N4/8/8/q2p2K1/kp1Q4/1N6/3B4 w - - 0 1)

Soranzo, Pier Giorgio

Telescacco 92, 1994

R7/B2N4/8/8/q2p2K1/kp1Q4/1N6/3B4

#2

7 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kb4
      • 2.Bc5#
    • 1...Qc6
      • 2.Qxb3#
    • 1...Qa5
      • 2.Qxb3#
    • 1...Qa6
      • 2.Qxb3#
    • 1...Qxa7
      • 2.Qxb3#
  • Tries
    • 1.Sxa4?
      • threat
        • 2.Qxb3#
      • 1...Kxa4
        • 2.Bc5#
      • 1...Kb4
        • 2.Bc5#
      • 1...Ka2!
  • Keys
    • 1.Bxd4!
      • threat
        • 2.Rxa4#
        • 2.Qxb3#
      • 1...Ka2
        • 2.Rxa4#
      • 1...Kb4
        • 2.Bc5#
        • 2.Rxa4#
      • 1...Qxa8
        • 2.Qxb3#
      • 1...Qa5
        • 2.Qxb3#
      • 1...Qa6
        • 2.Qxb3#
      • 1...Qa7
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • K(a);N_SPINP(b),S_FLIGHT::B(E)
    • Q(c);N_GUARD::QAR1(C),XP(b)
    • Q(c);N_GUARD,P_SPINQ(c),XB(E)::QAR1(C),XP(b)
  • Tries
    • Try
      • S(B);XQ(c)
      • Threat
        • QAR1(C),XP(b)
      • Vars
        • K(a);P-FLIGHT,XS(B)::R(G)+B(E)
        • K(a);N_SPINP(b),S_FLIGHT::B(E)
      • Refutation
        • K(a);N_SPINP(b),P-FLIGHT
  • Actual
    • B(E);P_PINQ(c),P_SPINB(E),XP(d)
    • Threat
      • DUALS(2)
    • Vars
      • K(a);N_SPINP(b),P-FLIGHT::R(G),XQ(c)
      • Q(c);N_PINB(E),N_SPINQ(c),XR(G)::QAR1(C),XP(b)
      • Q(c);N_PINB(E)::QAR1(C),XP(b)
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