MESON Chess Problem Database

Problem Display
PID: 86797 (q2b2b1/1n6/pp6/pPkP4/P2R2P1/2p1pQ2/4N2B/5K1B w - - 0 1)

Pilkarenko, CU

US Problem Bulletin, 1989

q2b2b1/1n6/pp6/pPkP4/P2R2P1/2p1pQ2/4N2B/5K1B

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd5
      • 2.Qxd5#
  • Tries
    • 1.Qf4?
      • threat
        • 2.Rc4#
      • 1...Bxd5
        • 2.Rxd5#
      • 1...Sd6
        • 2.Qxd6#
      • 1...axb5!
    • 1.Qf8+?
      • 1...Sd6
        • 2.Bxd6#
        • 2.Qxd6#
      • 1...Be7!
  • Keys
    • 1.Qxe3!
      • threat
        • 2.Qxc3#
      • 1...Bxd5
        • 2.Re4#
      • 1...Sd6
        • 2.Rf4#
      • 1...c2
        • 2.Qa3#
        • 2.Qc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • B(j);OGATE,XP(J)::QAR1(E),XB(j)
  • Tries
    • Try
      • Q(E);
      • Threat
        • R1(G)
      • Vars
        • B(j);OGATE,XP(J)::R1(G),XB(j)
        • S(g);N_GUARD::QAB1(E),XS(g)
      • Refutation
        • P(e);XP(I)
    • Try
      • Q(E);CHECK
      • Refutation
        • B(i);P_SPINB(i)
  • Actual
    • Q(E);XP(b)
    • Threat
      • QAR2(E),XP(a)
    • Vars
      • B(j);SBLOCK,XP(J)::QAB(E)+R(G)
      • S(g);SBLOCK::QAB(E)+R(G)
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