MESON Chess Problem Database

Problem Display
PID: 224671 (5Q2/1n1K2pN/6P1/4kBpR/8/4P3/5n2/8 w - - 0 1)

Barnett, Bernard

The Sunny South, 1887

5Q2/1n1K2pN/6P1/4kBpR/8/4P3/5n2/8

#2

7 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sa5
      • 2.Qc5#
    • 1...Sc5+
      • 2.Qxc5#
    • 1...Sd8
      • 2.Qc5#
    • 1...g4
      • 2.Bb1#
      • 2.Bc2#
      • 2.Bd3#
  • Tries
    • 1.Qd6+?
      • 1...Kxf5
        • 2.Qe6#
      • 1...Sxd6!
    • 1.Qe7+?
      • 1...Kxf5
        • 2.Rxg5#
        • 2.Qe6#
      • 1...Kd5!
    • 1.Qxg7+?
      • 1...Kd5
        • 2.Qd4#
      • 1...Kxf5!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Qd4#
      • 1...gxf6!
    • 1.Qe8+?
      • 1...Kxf5
        • 2.Rxg5#
        • 2.Qe6#
      • 1...Kd5!
  • Keys
    • 1.Qb4!
      • 1...Sc5+
        • 2.Qxc5#
      • 1...Kd5
        • 2.Qd4#
      • 1...Kxf5
        • 2.Rxg5#
      • 1...Sd1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Sd3
        • 2.Qe4#
      • 1...Sh3
        • 2.Qe4#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sg4
        • 2.Qe4#
      • 1...Sa5
        • 2.Qxa5#
        • 2.Qc5#
        • 2.Qb5#
      • 1...Sd6
        • 2.Qc5#
      • 1...Sd8
        • 2.Qa5#
        • 2.Qc5#
        • 2.Qb5#
      • 1...g4
        • 2.Bb1#
        • 2.Bc2#
        • 2.Bd3#
        • 2.Be4#
        • 2.Bxg4#
        • 2.Be6#
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 2
  • Sets
    • S(d);N_GUARD::QAR2(G)
    • S(d);CHECK,N_GUARD::QAR2(G),XS(d)
  • Tries
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINP(c),XB(B)::QAB1(G)
      • Refutation
        • S(d);XQ(G)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(G);CHECK,XP(e)
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(c),XB(B)
    • Try
      • Q(G);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAR1(G)
      • Refutation
        • P(e);XQ(G)
    • Try
      • Q(G);CHECK
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • Q(G);
    • Vars
      • S(d);CHECK,N_GUARD::QAR2(G),XS(d)
      • K(b);P-FLIGHT::QAR1(G)
      • K(b);OGATEB,P-FLIGHT,P_SPINP(c),XB(B)::R1(C),XP(c)
      • S(a);N_GUARD::QAR1(G)
      • S(a);N_GUARD::QAR1(G),XS(a)
      • S(d);N_GUARD::QAR2(G)
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