MESON Chess Problem Database

Problem Display
PID: 63077 (2B2r2/1QN5/3n4/qn1p1R2/3Pk2B/R4p1K/b2rP1N1/2b5 w - - 0 1)

Petite, Efren

1st Prize, Szachy, 1973

2B2r2/1QN5/3n4/qn1p1R2/3Pk2B/R4p1K/b2rP1N1/2b5

#2

10 + 10

3753 FIDE Album (1971-1973) 1978
136 Problem Observer 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4
      • 2.exf3#
    • 1...Rxc8
      • 2.Rf4#
    • 1...Rd8
      • 2.Rf4#
    • 1...Re8
      • 2.Rf4#
    • 1...Rg8
      • 2.Rf4#
    • 1...Rh8
      • 2.Rf4#
    • 1...Bb1
      • 2.Qxd5#
    • 1...Sxd4
      • 2.Re3#
    • 1...Sc4
      • 2.Qxd5#
    • 1...Sf7
      • 2.Rf4#
  • Keys
    • 1.Se6!
      • threat
        • 2.Re5#
      • 1...Kxf5
        • 2.Qh7#
      • 1...Rxd4
        • 2.Sc5#
      • 1...Rxf5
        • 2.Re3#
      • 1...Sxd4
        • 2.Sg5#
      • 1...Sxf5
        • 2.exf3#
      • 1...Sc4
        • 2.Qxd5#
      • 1...Sf7
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • R(c);SBLOCK,XP(E)::P(A),XP(d)
    • R(j);N_GUARD,XB(J)::R1(G)
    • R(j);N_GUARD::R1(G)
    • R(j);N_GUARD,P_PINB(F)::R1(G)
    • B(b);N_GUARD::QAB1(H),XP(h)
    • S(g);SBLOCK,XP(E)::R1(C)
    • S(i);S_CUTB(b)::QAB1(H),XP(h)
    • S(i);S_CUTR(j)::R1(G)
  • Actual
    • S(I);
    • Threat
      • R1(G)
    • Vars
      • K(e);N_SPINP(h),OGATEB,S_FLIGHT,XR(G)::QAB(H)
      • R(c);SBLOCK,XP(E)::S(I)
      • R(j);SBLOCK,XR(G)::R1(C)
      • S(g);SBLOCK,XP(E)::S(I)
      • S(i);SBLOCK,XR(G)::P(A),XP(d)
      • S(i);S_CUTB(b)::QAB1(H),XP(h)
      • S(i);S_CUTR(j)::R1(G)
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