MESON Chess Problem Database

Problem Display
PID: 168487 (b4K2/7P/5BPQ/R5P1/Np2k1r1/3p2P1/2nP4/4nR1N w - - 0 1)

Petite, Efren

Revista Romana de Sah, 1987

b4K2/7P/5BPQ/R5P1/Np2k1r1/3p2P1/2nP4/4nR1N

#2

12 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg3
      • 2.Sxg3#
    • 1...Rf4
      • 2.Rxf4#
    • 1...Rh4
      • 2.Qxh4#
    • 1...Rxg5
      • 2.Rf4#
    • 1...Bd5
      • 2.Sc5#
    • 1...Sf3
      • 2.Sf2#
    • 1...Sd4
      • 2.Re5#
    • 1...b3
      • 2.Sc3#
  • Tries
    • 1.Bb2?
      • threat
        • 2.Re5#
      • 1...Rf4+
        • 2.Rxf4#
      • 1...Rxg5
        • 2.Rf4#
      • 1...Bd5
        • 2.Sc5#
      • 1...Sf3
        • 2.Sf2#
      • 1...Sd4!
    • 1.Rff5?
      • threat
        • 2.Sf2#
      • 1...Rf4
        • 2.Rxf4#
      • 1...Bd5!
    • 1.Raf5?
      • threat
        • 2.Sc5#
      • 1...Rf4
        • 2.R1xf4#
      • 1...Sf3!
    • 1.Qh3?
      • threat
        • 2.Qxg4#
      • 1...Rxg3
        • 2.Sxg3#
        • 2.Qf5#
        • 2.Qe6#
      • 1...Rxg5
        • 2.Rf4#
      • 1...Rf4
        • 2.Rxf4#
        • 2.Qe6#
      • 1...Rh4
        • 2.Qf5#
        • 2.Qe6#
        • 2.Qxh4#
      • 1...Sg2
        • 2.Qxg2#
      • 1...Se3!
    • 1.g7?
      • threat
        • 2.Qg6#
      • 1...Rxg5
        • 2.Rf4#
      • 1...Rf4
        • 2.Rxf4#
      • 1...Sd4
        • 2.Re5#
      • 1...Se3!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qe7#
      • 1...Rxg5
        • 2.Rf4#
      • 1...Bd5
        • 2.Sc5#
      • 1...Sf3
        • 2.Sf2#
      • 1...Sd4
        • 2.Re5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 4
  • Sets
    • R(f);XP(D)::S(B),XR(f)
    • R(f);N_GUARD,P_PINB(H)::R1(A),XR(f)
    • R(f);OGATEB::QAR(J),XR(f)
    • R(f);N_GUARD,XP(G)::R1(A)
    • B(g);SBLOCK::S(E)
    • S(a);SBLOCK::S(B)
    • S(b);SBLOCK::R1(F)
    • P(d);N_GUARD::S(E)
  • Tries
    • Try
      • B(H);
      • Threat
        • R1(F)
      • Vars
        • R(f);CHECK,N_GUARD::R1(A),XR(f)
        • R(f);N_GUARD,XP(G)::R1(A)
        • B(g);SBLOCK::S(E)
        • S(a);SBLOCK::S(B)
      • Refutation
        • S(b);
    • Try
      • R(A);
      • Threat
        • S(B)
      • Vars
        • R(f);N_GUARD::R1(A),XR(f)
      • Refutation
        • B(g);
    • Try
      • R(F);
      • Threat
        • S(E)
      • Vars
        • R(f);N_GUARD::R1(A),XR(f)
      • Refutation
        • S(a);
    • Try
      • Q(J);
      • Threat
        • QAR2(J),XR(f)
      • Vars
        • R(f);N_GUARD,XP(G)::R1(A)
        • S(a);N_GUARD::QAB(J),XS(a)
      • Refutation
        • S(b);
    • Try
      • P(I);
      • Threat
        • QAB(J)
      • Vars
        • R(f);N_GUARD,XP(G)::R1(A)
        • R(f);N_GUARD,P_PINB(H)::R1(A),XR(f)
        • S(b);SBLOCK::R1(F)
      • Refutation
        • S(b);
  • Actual
    • Q(J);
    • Threat
      • QAR(J)
    • Vars
      • R(f);N_GUARD,XP(G)::R1(A)
      • B(g);SBLOCK::S(E)
      • S(a);SBLOCK::S(B)
      • S(b);SBLOCK::R1(F)
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