MESON Chess Problem Database

Problem Display
PID: 84942 (2b3QK/8/3p1pN1/3p1k2/3PpB1P/1q4R1/2r5/4R2B w - - 0 1)

Petite, Efren

US Problem Bulletin, 1993

2b3QK/8/3p1pN1/3p1k2/3PpB1P/1q4R1/2r5/4R2B

#2

9 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa4
      • 2.Qxd5#
    • 1...Qb1
      • 2.Qxd5#
    • 1...Qb2
      • 2.Qxd5#
    • 1...Qa3
      • 2.Qxd5#
    • 1...Qc3
      • 2.Qxd5#
    • 1...Qd3
      • 2.Qxd5#
    • 1...Qe3
      • 2.Qxd5#
    • 1...Qf3
      • 2.Qxd5#
    • 1...Qb4
      • 2.Qxd5#
    • 1...Qb6
      • 2.Qxd5#
    • 1...Qb8
      • 2.Qxd5#
    • 1...Ra2
      • 2.Qxc8#
    • 1...Rb2
      • 2.Qxc8#
    • 1...Rd2
      • 2.Qxc8#
    • 1...Re2
      • 2.Qxc8#
    • 1...Rf2
      • 2.Qxc8#
    • 1...Rg2
      • 2.Qxc8#
    • 1...Rh2
      • 2.Qxc8#
    • 1...Rc4
      • 2.Qxd5#
  • Tries
    • 1.Bd2?
      • threat
        • 2.Se7#
      • 1...Rxd2
        • 2.Qxc8#
      • 1...e3
        • 2.Rf1#
      • 1...Qe3
        • 2.Qxd5#
      • 1...Qb7
        • 2.Rf1#
      • 1...Rc7!
    • 1.Be3?
      • threat
        • 2.Se7#
      • 1...Qxe3
        • 2.Qxd5#
      • 1...Rc7
        • 2.Rf1#
      • 1...Qb7!
  • Keys
    • 1.Rf1!
      • threat
        • 2.Se7#
      • 1...Qb7
        • 2.Bd2#
      • 1...Qf3
        • 2.Qxd5#
      • 1...Rf2
        • 2.Qxc8#
      • 1...Rc7
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 17
  • Sets
    • Q(b);N_GUARD::QAR2(H),XP(d)
    • R(a);N_GUARD::QAB(H),XB(h)
    • R(a);N_GUARD,P_PINP(F)::QAB(H),XB(h)
    • R(a);S_CUTQ(b)::QAR2(H),XP(d)
  • Tries
    • Try
      • B(E);
      • Threat
        • S(G)
      • Vars
        • R(a);N_GUARD,XB(E)::QAB(H),XB(h)
        • P(c);S_CUTQ(b)::R(A)
        • Q(b);N_GUARD::QAR2(H),XP(d)
        • Q(b);N_GUARD::R(A)
      • Refutation
        • R(a);
    • Try
      • B(E);
      • Threat
        • S(G)
      • Vars
        • Q(b);N_GUARD,XB(E)::QAR2(H),XP(d)
        • R(a);N_GUARD::R(A)
      • Refutation
        • Q(b);
  • Actual
    • R(A);
    • Threat
      • S(G)
    • Vars
      • Q(b);N_GUARD::R(A)+B(E)
      • Q(b);N_GUARD::QAR2(H),XP(d)
      • R(a);N_GUARD::QAB(H),XB(h)
      • R(a);N_GUARD::R(A)+B(E)
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