MESON Chess Problem Database

Problem Display
PID: 11604 (8/2Qp3B/1p1N3R/3kp1n1/pr1PN2K/bp1b1p1p/1nP5/q2r4 w - - 0 1)

Casa, Alex

1st Prize, BCF 122. Ty., 1969-1970

8/2Qp3B/1p1N3R/3kp1n1/pr1PN2K/bp1b1p1p/1nP5/q2r4

#2

8 + 15

3751 FIDE Album (1968-1970) 1977

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.Qb7#
    • 1...b5
      • 2.Qc5#
  • Tries
    • 1.Sf6+?
      • 1...Ke6
        • 2.Qxd7#
      • 1...Kxd4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sc3#
      • 1...Kxe4
        • 2.Qxe5#
      • 1...Rxd4
        • 2.Se3#
      • 1...Bxe4
        • 2.Rd6#
      • 1...Sxe4
        • 2.Bg8#
      • 1...exd4
        • 2.Se7#
      • 1...Rc4
        • 2.Qxe5#
      • 1...Sc4
        • 2.Qb7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(j);P_PINS(C),SBLOCK,XP(B)::QAB(G)
    • P(n);N_GUARD::QAR1(G)
  • Tries
    • Try
      • S(C);CHECK,P_SPINP(B)
      • Vars
        • K(k);S_FLIGHT::QAB1(G),XP(o)
      • Refutation
        • K(k);P-FLIGHT,XP(B)
  • Actual
    • S(E);
    • Threat
      • S(C)
    • Vars
      • K(k);S_FLIGHT,XS(C)::QAR1(G),XP(l)
      • R(j);P_PINS(C),SBLOCK,XP(B)::S(E)
      • B(f);SBLOCK,XS(C)::R1(F)
      • S(m);N_GUARD,SBLOCK,XS(C)::B(H)
      • P(l);SBLOCK,XP(B)::S(E)
      • R(j);SBLOCK::QAR1(G),XP(l)
      • S(c);SBLOCK::QAB(G)
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