MESON Chess Problem Database

Problem Display
PID: 69444 (Q7/3B1Np1/8/3p4/4kp2/1K6/5P2/2N3B1 w - - 0 1)

Markx, BJM

Tijdschrift vd NSB, 1898

Q7/3B1Np1/8/3p4/4kp2/1K6/5P2/2N3B1

#2

7 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Kf3
      • 2.Qxd5#
    • 1...Kd4
      • 2.f3#
  • Tries
    • 1.Bg4?
      • threat
        • 2.f3#
      • 1...Kd4
        • 2.f3#
      • 1...f3!
    • 1.Bf5+?
      • 1...Kf3
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qa7#
        • 2.f3#
      • 1...Kxf5!
    • 1.Be6?
      • threat
        • 2.Qxd5#
      • 1...Kf3
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qxd5#
        • 2.f3#
      • 1...f3!
    • 1.Qa1?
      • threat
        • 2.Sg5#
      • 1...d4
        • 2.Qa8#
      • 1...f3
        • 2.Qe5#
      • 1...g5
        • 2.Sxg5#
      • 1...Kf3!
    • 1.Qa4+?
      • 1...d4
        • 2.Qc6#
        • 2.Qa8#
      • 1...Kf3!
    • 1.Qe8+?
      • 1...Kd4
        • 2.f3#
      • 1...Kf3!
  • Keys
    • 1.Qh8!
      • 1...Kf3
        • 2.Qh1#
      • 1...Kd4
        • 2.f3#
      • 1...f3
        • 2.Qh4#
      • 1...d4
        • 2.Qa8#
      • 1...g5
        • 2.Sxg5#
      • 1...g6
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB(G),XP(c)
    • K(a);N_SPINP(c),P-FLIGHT::B(B)+P(C)
  • Tries
    • Try
      • B(E);
      • Threat
        • P(C)
      • Vars
        • K(a);N_SPINP(c),P-FLIGHT::B(B)+P(C)
      • Refutation
        • P(b);
    • Try
      • B(E);CHECK
      • Vars
        • K(a);S_FLIGHT::QAB(G),XP(c)
      • Refutation
        • K(a);N_SPINP(c),S_FLIGHT,XB(E)
    • Try
      • B(E);
      • Threat
        • QAB1(G),XP(c)
      • Vars
        • K(a);S_FLIGHT::QAB(G),XP(c)
      • Refutation
        • P(b);
    • Try
      • Q(G);N_PINP(c)
      • Threat
        • S(F)
      • Vars
        • P(c);OGATEB,SBLOCK::QAB(G)
        • P(b);SBLOCK::QAR1(G)
        • P(d);::S(F),XP(d)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);CHECK,N_PINP(c)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(G);CHECK,N_PINP(c)
      • Vars
        • K(a);P-FLIGHT::B(B)+P(C)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(G);N_PINP(c)
    • Vars
      • K(a);S_FLIGHT::QAB(G)
      • K(a);P-FLIGHT,P_SPINP(d)::B(B)+P(C)
      • P(b);OGATEB,SBLOCK::QAR(G)
      • P(c);OGATEB,SBLOCK::QAB(G)
      • P(d);::S(F),XP(d)
      • P(d);::S(F)
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