MESON Chess Problem Database

Problem Display
PID: 7329 (K2n4/1p2Bn2/1N3R2/1b1Pk3/3R1p2/1N4r1/7Q/8 w - - 0 1)

Petite, Efren

Problemas, 1999

K2n4/1p2Bn2/1N3R2/1b1Pk3/3R1p2/1N4r1/7Q/8

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rg1
      • 2.Qxf4#
    • 1...Rg2
      • 2.Qxf4#
    • 1...Rxb3
      • 2.Qxf4#
    • 1...Rc3
      • 2.Qxf4#
    • 1...Rd3
      • 2.Qxf4#
    • 1...Re3
      • 2.Qxf4#
    • 1...Rh3
      • 2.Qxf4#
    • 1...Rg5
      • 2.Qxf4#
    • 1...Rg6
      • 2.Qxf4#
    • 1...Rg7
      • 2.Qxf4#
    • 1...Rg8
      • 2.Qxf4#
    • 1...Bf1
      • 2.Sd7#
    • 1...Be2
      • 2.Sd7#
    • 1...Bd3
      • 2.Sd7#
    • 1...Ba4
      • 2.Sc4#
    • 1...Bc4
      • 2.Sxc4#
      • 2.Sd7#
    • 1...Ba6
      • 2.Sd7#
    • 1...Bc6
      • 2.Sc4#
    • 1...Bd7
      • 2.Sc4#
      • 2.Sxd7#
    • 1...Be8
      • 2.Sc4#
    • 1...Sc6
      • 2.Sd7#
    • 1...f3
      • 2.Qxg3#
  • Tries
    • 1.Rdxf4?
      • threat
        • 2.R6f5#
      • 1...Rg5
        • 2.Rg4#
        • 2.Qb2#
      • 1...Bd3
        • 2.Qb2#
      • 1...Sd6
        • 2.Bxd6#
      • 1...Sh6
        • 2.Bd6#
      • 1...Bd7!
    • 1.Qe2+?
      • 1...Bxe2
        • 2.Sd7#
      • 1...Re3!
  • Keys
    • 1.Rfxf4!
      • threat
        • 2.Rde4#
      • 1...Re3
        • 2.Rf3#
      • 1...Bd3
        • 2.Sd7#
      • 1...Sg5
        • 2.Qh8#
      • 1...Sd6
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 18
  • Sets
    • R(a);OGATE,P_SPINP(b)::QAB1(A),XP(b)
    • R(a);OGATE,P_SPINP(b),XS(B)::QAB1(A),XP(b)
    • B(c);N_GUARD::S(E)
    • S(g);S_CUTB(c)::S(E)
    • P(b);OGATEB,P_SPINR(a)::QAB(A),XR(a)
  • Tries
    • Try
      • R(C);XP(b)
      • Threat
        • R1(F)
      • Vars
        • B(c);S_CUTR(a)::QAB(A)
        • S(f);N_GUARD::B(G),XS(f)
        • S(f);N_GUARD::B(G)
      • Refutation
        • B(c);
    • Try
      • Q(A);CHECK
      • Vars
        • B(c);XQ(A)::S(E)
      • Refutation
        • R(a);P_SPINR(a)
  • Actual
    • R(F);XP(b)
    • Threat
      • R1(C)
    • Vars
      • R(a);OGATEB::QAB(A)+R(F)
      • B(c);N_GUARD::S(E)
      • S(f);N_GUARD,S_CUTR(a)::QAB(A)
      • S(f);SBLOCK::B(G)
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