MESON Chess Problem Database

Problem Display
PID: 218499 (8/8/K3p2Q/1N1k4/3P2P1/1P1R4/5B1b/8 w - - 0 1)

Mackay, Donald

Youth, 1882

8/8/K3p2Q/1N1k4/3P2P1/1P1R4/5B1b/8

#2

8 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qh1#
    • 1...Bg3
      • 2.Qh1#
    • 1...Bf4
      • 2.Qh1#
    • 1...Be5
      • 2.Qh1#
    • 1...Bd6
      • 2.Qh1#
    • 1...Bc7
      • 2.Qh1#
    • 1...Bb8
      • 2.Qh1#
    • 1...e5
      • 2.Sc3#
  • Tries
    • 1.Kb7?
      • 1...Bg1
        • 2.Qh1#
      • 1...Bg3
        • 2.Qh1#
      • 1...Bf4
        • 2.Qh1#
      • 1...Be5
        • 2.Qh1#
      • 1...Bd6
        • 2.Sc3#
        • 2.Qh1#
      • 1...Bc7
        • 2.Qh1#
      • 1...Bb8
        • 2.Qh1#
      • 1...e5
        • 2.Sc3#
        • 2.Qc6#
      • 1...Ke4!
    • 1.Bg3?
      • 1...Kc6
        • 2.Qxe6#
      • 1...Bxg3
        • 2.Qh1#
      • 1...Bg1
        • 2.Qh1#
      • 1...e5
        • 2.Sc3#
      • 1...Ke4!
    • 1.Rc3?
      • 1...Bg1
        • 2.Qh1#
      • 1...Bg3
        • 2.Qh1#
      • 1...Bf4
        • 2.Qh1#
      • 1...Be5
        • 2.Qh1#
      • 1...Bd6
        • 2.Qh1#
      • 1...Bc7
        • 2.Qh1#
      • 1...Bb8
        • 2.Qh1#
      • 1...e5
        • 2.Qc6#
      • 1...Ke4!
    • 1.Re3?
      • threat
        • 2.Qxe6#
      • 1...Be5
        • 2.Qh1#
      • 1...Bd6
        • 2.Qh1#
      • 1...e5
        • 2.Qd6#
      • 1...Kc6!
    • 1.Qh7?
      • threat
        • 2.Qb7#
      • 1...Kc6
        • 2.Qb7#
      • 1...Bc7
        • 2.Qh1#
      • 1...e5!
  • Keys
    • 1.Rg3!
      • 1...Ke4
        • 2.Sc3#
      • 1...Kc6
        • 2.Qxe6#
      • 1...Bxg3
        • 2.Qh1#
      • 1...Bg1
        • 2.Qh1#
      • 1...e5
        • 2.Sc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • B(a);OGATE::QAB(H)
    • P(c);::S(F)
  • Tries
    • Try
      • K(G);S_FLIGHT
      • Vars
        • B(a);OGATE::QAB(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(A);
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::QAR2(H),XP(c)
        • B(a);OGATE,XB(A)::QAB(H)
        • B(a);OGATE::QAB(H)
        • P(c);::S(F)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);
      • Vars
        • B(a);OGATE::QAB(H)
        • P(c);OGATE::QAB1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(C);
      • Threat
        • QAB1(H),XP(c)
      • Vars
        • B(a);OGATE::QAB(H)
        • P(c);OGATE::QAR1(H)
      • Refutation
        • K(b);P_SPINP(c),S_FLIGHT
    • Try
      • Q(H);
      • Threat
        • QAB(H)
      • Vars
        • K(b);S_FLIGHT::QAB1(H)
        • B(a);OGATE::QAB(H)
      • Refutation
        • P(c);
  • Actual
    • R(C);
    • Vars
      • K(b);S_FLIGHT::S(F)
      • K(b);P_SPINP(c),S_FLIGHT::QAR2(H),XP(c)
      • B(a);OGATE,XR(C)::QAB(H)
      • B(a);OGATE::QAB(H)
      • P(c);::S(F)
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