MESON Chess Problem Database

Problem Display
PID: 212843 (8/8/3R4/8/3nkpQ1/B7/5K2/8 w - - 0 1)

Benko, Pal Charles

Deutsche Schachzeitung, 1973

8/8/3R4/8/3nkpQ1/B7/5K2/8

#2

4 + 3

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qe6#
    • 1...Se2
      • 2.Qe6#
    • 1...Sb3
      • 2.Qe6#
    • 1...Sb5
      • 2.Qe6#
    • 1...Se6
      • 2.Qxe6#
  • Tries
    • 1.Bc1?
      • 1...Ke5
        • 2.Qxf4#
      • 1...Sc2
        • 2.Qe6#
        • 2.Qxf4#
      • 1...Se2
        • 2.Qe6#
      • 1...Sb3
        • 2.Qe6#
        • 2.Qxf4#
      • 1...Sf3
        • 2.Qxf4#
      • 1...Sb5
        • 2.Qe6#
        • 2.Qxf4#
      • 1...Sf5
        • 2.Qxf4#
      • 1...Sc6
        • 2.Qxf4#
      • 1...Se6
        • 2.Qxe6#
      • 1...Kd3!
    • 1.Qg6+?
      • 1...Sf5
        • 2.Qe6#
      • 1...Ke5!
  • Keys
    • 1.Bb2!
      • 1...Kd3
        • 2.Qe2#
      • 1...Ke5
        • 2.Qe6#
      • 1...Sc2
        • 2.Qe6#
        • 2.Qg6#
      • 1...Se2
        • 2.Qe6#
        • 2.Qg6#
      • 1...Sb3
        • 2.Qe6#
        • 2.Qg6#
      • 1...Sf3
        • 2.Qg6#
      • 1...Sb5
        • 2.Qe6#
        • 2.Qg6#
      • 1...Sf5
        • 2.Qf3#
      • 1...Sc6
        • 2.Qg6#
      • 1...Se6
        • 2.Qxe6#
        • 2.Qg6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 5
  • Sets
    • S(a);N_GUARD::QAR2(C)
    • S(a);N_GUARD::QAR2(C),XS(a)
  • Tries
    • Try
      • B(B);
      • Vars
        • K(b);N_SPINP(c),P-FLIGHT::QAB1(C),XP(c)
        • S(a);N_GUARD::QAR2(C)
        • S(a);::QAR1(C),XP(c)
        • S(a);N_GUARD::QAR2(C),XS(a)
      • Refutation
        • K(b);N_SPINP(c),P_SPINS(a),S_FLIGHT
    • Try
      • Q(C);CHECK,N_PINP(c)
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(C)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • B(B);
    • Vars
      • K(b);N_SPINP(c),P_SPINS(a),S_FLIGHT::QAB1(C)
      • K(b);N_SPINP(c),P-FLIGHT,P_SPINS(a)::QAR1(C)
      • S(a);N_GUARD::QAB(C)
      • S(a);N_GUARD,SBLOCK::QAB1(C)
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