MESON Chess Problem Database

Problem Display
PID: 206711 (8/8/7K/5kp1/3nRP2/5R2/2B5/1Q6 w - - 0 1)

Dulcsan, Geza

Nepszava, 1925

8/8/7K/5kp1/3nRP2/5R2/2B5/1Q6

#2

6 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.fxg5#
    • 1...Sb3
      • 2.fxg5#
    • 1...Sb5
      • 2.fxg5#
    • 1...Sc6
      • 2.fxg5#
    • 1...gxf4
      • 2.Rfxf4#
  • Tries
    • 1.Qa2?
      • 1...Kf6
        • 2.fxg5#
      • 1...Sxc2
        • 2.Qe6#
      • 1...Sxf3
        • 2.Qe6#
      • 1...gxf4
        • 2.Rfxf4#
      • 1...Se2
        • 2.Qe6#
      • 1...Sb3
        • 2.fxg5#
      • 1...Sb5
        • 2.Qe6#
        • 2.fxg5#
      • 1...Sc6
        • 2.Qe6#
        • 2.fxg5#
      • 1...Se6
        • 2.Qxe6#
      • 1...g4
        • 2.Qf7#
      • 1...Kg4!
    • 1.Qb5+?
      • 1...Kf6
        • 2.fxg5#
      • 1...Sxb5
        • 2.fxg5#
      • 1...Kg4!
    • 1.Qb6?
      • 1...Sxc2
        • 2.Qe6#
      • 1...Sxf3
        • 2.Qe6#
      • 1...gxf4
        • 2.Rfxf4#
        • 2.Qg6#
      • 1...Sc6
        • 2.fxg5#
      • 1...Se6
        • 2.Qxe6#
      • 1...Se2
        • 2.Qe6#
      • 1...Sb3
        • 2.Qe6#
        • 2.fxg5#
      • 1...Sb5
        • 2.Qe6#
        • 2.fxg5#
      • 1...g4
        • 2.Rxd4#
        • 2.Re5#
        • 2.Qg6#
      • 1...Kg4!
  • Keys
    • 1.Qb3!
      • 1...Kg4
        • 2.fxg5#
        • 2.f5#
      • 1...Kf6
        • 2.fxg5#
      • 1...Sxc2
        • 2.Qe6#
      • 1...Sxb3
        • 2.fxg5#
      • 1...Sxf3
        • 2.Qe6#
      • 1...gxf4
        • 2.Rfxf4#
      • 1...Se2
        • 2.Qe6#
      • 1...Sb5
        • 2.Qe6#
        • 2.fxg5#
      • 1...Sc6
        • 2.Qe6#
        • 2.fxg5#
      • 1...Se6
        • 2.Qxe6#
      • 1...g4
        • 2.Qf7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • K(b);P-FLIGHT::R(C)+P(E)DCHECK,XP(c)
    • S(a);N_GUARD::R(C)+P(E),XP(c)
    • P(c);OGATE,P_SPINP(c),XP(E)::R1(C),XP(c)
  • Tries
    • Try
      • Q(A);
      • Vars
        • K(b);P-FLIGHT::R(C)+P(E)DCHECK,XP(c)
        • S(a);N_GUARD,XB(B)::QAB1(A)
        • S(a);N_GUARD,XR(C)::QAB1(A)
        • P(c);OGATE,P_SPINP(c),XP(E)::R1(C),XP(c)
        • S(a);N_GUARD::QAB1(A)
        • S(a);N_GUARD::R(C)+P(E),XP(c)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • P(c);SBLOCK::QAR2(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::R(C)+P(E)DCHECK,XP(c)
        • S(a);XQ(A)::R(C)+P(E),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD,XB(B)::QAB1(A)
        • S(a);N_GUARD,XR(C)::QAB1(A)
        • S(a);N_GUARD::R(C)+P(E),XP(c)
        • S(a);N_GUARD::QAB1(A),XS(a)
        • S(a);N_GUARD::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(A);
    • Vars
      • K(b);P-FLIGHT::R(C)+P(E)DCHECK,XP(c)
      • S(a);N_GUARD,XB(B)::QAB1(A)
      • S(a);N_GUARD,XQ(A)::R(C)+P(E),XP(c)
      • S(a);N_GUARD,XR(C)::QAB1(A)
      • P(c);OGATE,P_SPINP(c),XP(E)::R1(C),XP(c)
      • S(a);N_GUARD::QAB1(A)
      • S(a);N_GUARD::QAB1(A),XS(a)
      • P(c);SBLOCK::QAR2(A)
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