MESON Chess Problem Database

Problem Display
PID: 225521 (5r1B/1N1Bp3/3b3p/3krn1R/1p1p1Q1p/3PpP1N/8/1K5b w - - 0 1)

Hronec, Jaroslav

Praca, 1954

5r1B/1N1Bp3/3b3p/3krn1R/1p1p1Q1p/3PpP1N/8/1K5b

#2

9 + 12

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qxe4#
    • 1...Re6
      • 2.Qxd4#
    • 1...Bc5
      • 2.Qxe5#
    • 1...Sg7
      • 2.Qe4#
  • Tries
    • 1.Bxe5?
      • threat
        • 2.Qe4#
      • 1...Sg3
        • 2.Qxd4#
      • 1...Bxf3!
    • 1.Rxf5?
      • threat
        • 2.Qe4#
      • 1...Bxf3
        • 2.Qxf3#
      • 1...Rfxf5!
  • Keys
    • 1.Qg4!
      • threat
        • 2.Sf4#
      • 1...Re4
        • 2.Qxe4#
      • 1...Re6
        • 2.Qxd4#
      • 1...Sg3
        • 2.Qe6#
      • 1...Sg7
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(g);N_GUARD,P_SPINS(h)::QAB1(E),XR(g)
    • R(g);P_SPINS(h)::QAR1(E),XP(d)
    • B(i);N_GUARD::QAR1(E),XR(g)
    • S(h);P_SPINR(g)::QAB1(E)
  • Tries
    • Try
      • B(I);XR(g)
      • Threat
        • QAB1(E)
      • Vars
        • S(h);N_GUARD::QAR1(E),XP(d)
      • Refutation
        • B(a);XP(C)
    • Try
      • R(F);P_PINR(g),XS(h)
      • Threat
        • QAB1(E)
      • Vars
        • B(a);OGATE,XP(C)::QAB(E),XB(a)
      • Refutation
        • R(l);N_SPINR(g),XR(F)
  • Actual
    • Q(E);
    • Threat
      • S(D)
    • Vars
      • R(g);N_GUARD,P_SPINS(h)::QAB1(E),XR(g)
      • R(g);P_SPINS(h)::QAR1(E),XP(d)
      • S(h);OGATE,P_SPINR(g)::QAB1(E)
      • S(h);P_SPINR(g)::QAB1(E)
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