MESON Chess Problem Database

Problem Display
PID: 102167 (5K2/3p4/4k1N1/8/6n1/3QPR2/8/8 w - - 0 1)

Wrobel, Marian

Prize, Dagbladet, 1956

5K2/3p4/4k1N1/8/6n1/3QPR2/8/8

#2

5 + 3

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...d6
      • 2.Qf5#
  • Tries
    • 1.Kg7?
      • 1...Sxe3
        • 2.Rxe3#
        • 2.Rf6#
      • 1...d6
        • 2.Qf5#
      • 1...Sf2
        • 2.Rf6#
      • 1...Sh2
        • 2.Rf6#
      • 1...Se5
        • 2.Rf6#
      • 1...Sf6
        • 2.Rxf6#
      • 1...Sh6
        • 2.Rf6#
      • 1...d5!
    • 1.Ke8?
      • threat
        • 2.Qxd7#
      • 1...d5
        • 2.Qa6#
      • 1...Se5
        • 2.Sf8#
      • 1...d6
        • 2.Qf5#
      • 1...Sf6+!
    • 1.Rf5?
      • threat
        • 2.Sf4#
        • 2.Qd5#
      • 1...Sxe3
        • 2.Sf4#
      • 1...d5
        • 2.Qxd5#
      • 1...Se5
        • 2.Sf4#
      • 1...Sf6
        • 2.Sf4#
        • 2.Re5#
      • 1...d6!
    • 1.Qc4+?
      • 1...d5
        • 2.Qc6#
      • 1...Kd6!
    • 1.Qe4+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Kd6!
    • 1.Qb5?
      • 1...Sxe3
        • 2.Qe5#
      • 1...Sf2
        • 2.Qe5#
      • 1...Sh2
        • 2.Qe5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Sf6
        • 2.Qe5#
      • 1...Sh6
        • 2.Qe5#
      • 1...d5
        • 2.Qc6#
      • 1...d6
        • 2.Qf5#
      • 1...Kd6!
  • Keys
    • 1.Rf7!
      • threat
        • 2.Qxd7#
      • 1...d5
        • 2.Qa6#
      • 1...Se5
        • 2.Sf4#
      • 1...Sf6
        • 2.Re7#
      • 1...d6
        • 2.Qf5#

Anticipated by 37983(1936)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);SBLOCK::QAB1(A)
  • Tries
    • Try
      • K(E);S_FLIGHT
      • Vars
        • P(c);SBLOCK::QAB1(A)
        • S(a);N_GUARD::R1(C)
        • S(a);N_GUARD::R1(C),XS(a)
      • Refutation
        • P(c);
    • Try
      • K(E);P-FLIGHT
      • Threat
        • QAB1(A),XP(c)
      • Vars
        • P(c);N_GUARD,SBLOCK::QAR(A)
        • S(a);SBLOCK::S(D)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • S(a);CHECK
    • Try
      • R(C);
      • Threat
        • DUALS(2)
      • Vars
        • S(a);XP(B)::S(D)
        • P(c);::QAB1(A),XP(c)
        • S(a);::S(D)
      • Refutation
        • P(c);
    • Try
      • Q(A);CHECK
      • Vars
        • P(c);N_GUARD,P_SPINP(c)::QAR2(A)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD,XP(B)::QAR1(A)
        • S(a);N_GUARD::QAR1(A)
        • S(a);N_GUARD::QAR1(A),XS(a)
        • P(c);N_GUARD::QAR2(A)
        • P(c);SBLOCK::QAB1(A)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • R(C);
    • Threat
      • QAB1(A),XP(c)
    • Vars
      • P(c);N_GUARD,SBLOCK::QAR(A)
      • S(a);SBLOCK::S(D)
      • S(a);SBLOCK::R1(C)
      • P(c);SBLOCK::QAB1(A)
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