MESON Chess Problem Database

Problem Display
PID: 146441 (2K2B2/p1Q1N2B/3pRP2/8/1p1k1qnr/7b/rPnb1Rp1/3N4 w - - 0 1)

Petite, Efren

Chess, 1955

2K2B2/p1Q1N2B/3pRP2/8/1p1k1qnr/7b/rPnb1Rp1/3N4

#2

10 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qh2
      • 2.Rxd2#
    • 1...Qe5
      • 2.Rxd2#
    • 1...Qxf6
      • 2.Rxd2#
    • 1...Be1
      • 2.Rxf4#
    • 1...Bc3
      • 2.Rxf4#
    • 1...Sce3
      • 2.Rxd2#
      • 2.Rxf4#
    • 1...Sge3
      • 2.Rxd2#
  • Tries
    • 1.Re4+?
      • 1...Kd3
        • 2.Qc4#
      • 1...Qxe4!
    • 1.Rxd6+?
      • 1...Ke5
        • 2.Sc6#
        • 2.Qc5#
      • 1...Qxd6!
    • 1.Qxd6+?
      • 1...Kc4
        • 2.Qd5#
      • 1...Qxd6!
  • Keys
    • 1.b3!
      • threat
        • 2.Qc4#
      • 1...Sa3
        • 2.Qxa7#
      • 1...Sce3
        • 2.Rxf4#
      • 1...Sge3
        • 2.Rxd2#
      • 1...Se5
        • 2.Qxd6#
      • 1...d5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • Q(h);N_GUARD::R(C),XB(c)
    • Q(h);N_GUARD,XP(E)::R(C),XB(c)
    • B(c);N_GUARD::R(C),XQ(h)
    • S(i);P_PINR(D),S_CUTQ(h)::R(C),XB(c)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(g);P-FLIGHT::QAB1(F)
      • Refutation
        • Q(h);XR(D)
    • Try
      • R(D);CHECK,XP(k)
      • Refutation
        • Q(h);XR(D)
    • Try
      • Q(F);CHECK,XP(k)
      • Vars
        • K(g);P-FLIGHT::QAB1(F)
      • Refutation
        • Q(h);XQ(F)
  • Actual
    • P(B);
    • Threat
      • QAR1(F)
    • Vars
      • S(b);S_CUTR(a)::QAB(F),XP(l)
      • S(b);S_CUTB(c)::R(C),XQ(h)
      • S(i);P_PINR(D),S_CUTQ(h)::R(C),XB(c)
      • S(i);P_PINR(D),S_CUTQ(h)::QAR2(F),XP(k)
      • P(k);SBLOCK::S(G)
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