MESON Chess Problem Database

Problem Display
PID: 238938 (bQ5K/8/1p1B1R2/1PpkPN2/1p1Npb2/1P2p2n/r5r1/7R w - - 0 1)

Petite, Efren

L'Italia Scacchistica, 1988

bQ5K/8/1p1B1R2/1PpkPN2/1p1Npb2/1P2p2n/r5r1/7R

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rab2
      • 2.Qxa8#
    • 1...Rac2
      • 2.Qxa8#
    • 1...Rad2
      • 2.Qxa8#
    • 1...Rae2
      • 2.Qxa8#
    • 1...Raf2
      • 2.Qxa8#
    • 1...Rgb2
      • 2.Qg8#
    • 1...Rgc2
      • 2.Qg8#
    • 1...Rgd2
      • 2.Qg8#
    • 1...Rge2
      • 2.Qg8#
    • 1...Rgf2
      • 2.Qg8#
    • 1...Rh2
      • 2.Qg8#
    • 1...Rg8+
      • 2.Qxg8#
    • 1...Bg3
      • 2.Qg8#
    • 1...Bg5
      • 2.Qg8#
    • 1...Bb7
      • 2.Qxb7#
    • 1...cxd4
      • 2.Se7#
  • Tries
    • 1.Sc2?
      • threat
        • 2.Se7#
      • 1...Rg8+
        • 2.Qxg8#
      • 1...Raxc2
        • 2.Qxa8#
      • 1...Rgxc2
        • 2.Qg8#
      • 1...Rg7
        • 2.Rd1#
      • 1...Ra7!
    • 1.Se2?
      • threat
        • 2.Se7#
      • 1...Rg8+
        • 2.Qxg8#
      • 1...Raxe2
        • 2.Qxa8#
      • 1...Rgxe2
        • 2.Qg8#
      • 1...Ra7
        • 2.Rd1#
      • 1...Rg7!
    • 1.Qc8?
      • threat
        • 2.Qe6#
      • 1...Rg8+
        • 2.Qxg8#
      • 1...Sg5!
    • 1.Qe8?
      • threat
        • 2.Qf7#
        • 2.Qe6#
      • 1...Rg8+
        • 2.Qxg8#
      • 1...Ra7
        • 2.Qe6#
      • 1...Rg7
        • 2.Qe6#
      • 1...Sg5!
  • Keys
    • 1.Rd1!
      • threat
        • 2.Se7#
      • 1...Rg8+
        • 2.Qxg8#
      • 1...Ra7
        • 2.Se2#
      • 1...Rad2
        • 2.Qxa8#
      • 1...Rgd2
        • 2.Qg8#
      • 1...Rg7
        • 2.Sc2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 13
  • Sets
    • R(a);N_GUARD::QAB(I),XB(k)
    • R(b);N_GUARD::QAB(I)
    • R(b);CHECK,N_GUARD::QAB(I),XR(b)
    • B(g);S_CUTR(b)::QAB(I)
    • B(k);N_GUARD::QAB(I),XB(k)
    • P(h);SBLOCK,XS(C)::S(F)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(F)
      • Vars
        • R(b);CHECK,N_GUARD::QAB(I),XR(b)
        • R(a);N_GUARD,XS(C)::QAB(I),XB(k)
        • R(b);N_GUARD,XS(C)::QAB(I)
        • R(b);N_GUARD::R(A)
      • Refutation
        • R(a);
    • Try
      • S(C);
      • Threat
        • S(F)
      • Vars
        • R(b);CHECK,N_GUARD::QAB(I),XR(b)
        • R(a);N_GUARD,XS(C)::QAB(I),XB(k)
        • R(b);N_GUARD,XS(C)::QAB(I)
        • R(a);N_GUARD::R(A)
      • Refutation
        • R(b);
    • Try
      • Q(I);
      • Threat
        • QAB1(I)
      • Vars
        • R(b);CHECK,N_GUARD::QAB(I),XR(b)
      • Refutation
        • S(d);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);CHECK,N_GUARD::QAB(I),XR(b)
        • R(a);::QAB1(I)
        • R(b);::QAB1(I)
      • Refutation
        • S(d);
  • Actual
    • R(A);
    • Threat
      • S(F)
    • Vars
      • R(b);CHECK,N_GUARD::QAB(I),XR(b)
      • R(a);N_GUARD::R(A)+S(C)
      • R(a);N_GUARD::QAB(I),XB(k)
      • R(b);N_GUARD::QAB(I)
      • R(b);N_GUARD::R(A)+S(C)
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