MESON Chess Problem Database

Problem Display
PID: 225335 (8/8/7K/5N2/3QPk2/3nr1R1/8/7B w - - 0 1)

Kovacik, Jozef

Praca Prvotina, 1956

8/8/7K/5N2/3QPk2/3nr1R1/8/7B

#2

6 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe4
      • 2.Qxe4#
    • 1...Sc1
      • 2.Qd6#
    • 1...Se1
      • 2.Qd6#
    • 1...Sb2
      • 2.Qd6#
    • 1...Sf2
      • 2.Qd6#
    • 1...Sb4
      • 2.Qd6#
    • 1...Sc5
      • 2.Qd6#
    • 1...Se5
      • 2.Qxe3#
  • Tries
    • 1.Kh5?
      • threat
        • 2.Rg4#
      • 1...Rxe4
        • 2.Rf3#
        • 2.Qxe4#
      • 1...Sf2
        • 2.Qd6#
      • 1...Se5
        • 2.Qxe3#
      • 1...Rxg3!
    • 1.Rf3+?
      • 1...Kg4
        • 2.Qg7#
      • 1...Rxf3!
    • 1.e5+?
      • 1...Re4
        • 2.Qxe4#
      • 1...Kxf5!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Rg4#
      • 1...Rxg3
        • 2.Qxg3#
      • 1...Rxe4
        • 2.Rf3#
      • 1...Sf2
        • 2.Qc7#
      • 1...Se5
        • 2.Qg5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • R(b);OGATE,P_SPINR(b),XP(D)::QAR1(C),XR(b)
    • S(a);N_GUARD::QAB(C)
    • S(a);SBLOCK::QAB1(C),XR(b)
  • Tries
    • Try
      • K(F);P-FLIGHT
      • Threat
        • R1(B)
      • Vars
        • S(a);N_GUARD::QAB(C)
        • S(a);SBLOCK::QAB1(C),XR(b)
      • Refutation
        • R(b);XR(B)
    • Try
      • R(B);CHECK
      • Vars
        • K(c);P-FLIGHT::QAR(C)
      • Refutation
        • R(b);XR(B)
    • Try
      • P(D);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAR1(C),XR(b)
      • Refutation
        • K(c);P-FLIGHT,XS(E)
  • Actual
    • Q(C);
    • Threat
      • R1(B)
    • Vars
      • R(b);OGATE,XR(B)::QAB1(C),XR(b)
      • R(b);N_GUARD,SBLOCK,XP(D)::R1(B)
      • S(a);N_GUARD::QAB(C)
      • S(a);SBLOCK::QAB1(C)
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