MESON Chess Problem Database

Problem Display
PID: 168453 (7b/6n1/KN4br/1R3Nrp/5k1P/4pPp1/4P1Q1/B7 w - - 0 1)

Petite, Efren

4th HM., Problemas, 1984

7b/6n1/KN4br/1R3Nrp/5k1P/4pPp1/4P1Q1/B7

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf5
      • 2.Rb4#
    • 1...Bxf5
      • 2.Be5#
    • 1...Sxf5
      • 2.Sd5#
  • Tries
    • 1.Bd4?
      • threat
        • 2.Bxe3#
      • 1...Bxf5
        • 2.Be5#
      • 1...Sxf5
        • 2.Sd5#
      • 1...Rxf5!
    • 1.Qh3?
      • threat
        • 2.Sd5#
        • 2.Be5#
        • 2.Rb4#
      • 1...Rxf5
        • 2.Rb4#
      • 1...Bxf5
        • 2.Be5#
      • 1...Sxf5
        • 2.Sd5#
      • 1...Bf7
        • 2.Be5#
      • 1...Bh7
        • 2.Be5#
        • 2.Rb4#
      • 1...Be8
        • 2.Be5#
        • 2.Rb4#
      • 1...Se6
        • 2.Sd5#
      • 1...Se8
        • 2.Sd5#
      • 1...Rg4!
  • Keys
    • 1.Qg1!
      • threat
        • 2.Qxe3#
      • 1...Rxf5
        • 2.Rb4#
      • 1...Bxf5
        • 2.Be5#
      • 1...Sxf5
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 0
  • Sets
    • R(d);SBLOCK,XS(G)::R(F)
    • B(f);P_PINS(I),SBLOCK,XS(G)::B(A)
    • S(h);SBLOCK,XS(G)::S(I)
  • Tries
    • Try
      • B(A);
      • Threat
        • B(A),XP(a)
      • Vars
        • B(f);P_PINS(I),SBLOCK,XS(G)::B(A)
        • S(h);SBLOCK,XS(G)::S(I)
      • Refutation
        • R(d);XS(G)
    • Try
      • Q(C);
      • Threat
        • DUALS(3)
      • Vars
        • R(d);XS(G)::R(F)
        • B(f);P_PINS(I),XS(G)::B(A)
        • S(h);XS(G)::S(I)
        • B(f);P_PINS(I)::B(A)
        • S(h);::S(I)
      • Refutation
        • R(d);
  • Actual
    • Q(C);
    • Threat
      • QAB1(C),XP(a)
    • Vars
      • R(d);SBLOCK,XS(G)::R(F)
      • B(f);P_PINS(I),SBLOCK,XS(G)::B(A)
      • S(h);SBLOCK,XS(G)::S(I)
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