MESON Chess Problem Database

Problem Display
PID: 222555 (Q7/8/8/P1p5/2k5/PN3P2/2K2n2/6B1 w - - 0 1)

Ballantine, William A

Philadelphia Times, 1884

Q7/8/8/P1p5/2k5/PN3P2/2K2n2/6B1

#2

7 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Tries
    • 1.Sd2+?
      • 1...Kd4
        • 2.Qe4#
      • 1...Kb5!
    • 1.Qc6?
      • threat
        • 2.Qxc5#
      • 1...Sd3
        • 2.Sd2#
      • 1...Se4!
    • 1.Qb7?
      • 1...Sd1
        • 2.Sd2#
      • 1...Sh1
        • 2.Sd2#
      • 1...Sd3
        • 2.Sd2#
      • 1...Sh3
        • 2.Sd2#
      • 1...Sg4
        • 2.Sd2#
      • 1...Se4!
    • 1.Qd8?
      • 1...Sd1
        • 2.Qd3#
      • 1...Sh1
        • 2.Qd3#
      • 1...Sd3
        • 2.Qxd3#
      • 1...Sh3
        • 2.Qd3#
      • 1...Se4
        • 2.Qd3#
      • 1...Sg4
        • 2.Qd3#
      • 1...Kb5!
    • 1.a4?
      • 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...Kb4!
  • Keys
    • 1.Sd4!
      • 1...Kxd4
        • 2.Qe4#
      • 1...cxd4
        • 2.Qc6#
      • 1...Sd1
        • 2.Qg8#
      • 1...Sh1
        • 2.Qg8#
      • 1...Sd3
        • 2.Qg8#
      • 1...Sh3
        • 2.Qg8#
      • 1...Se4
        • 2.Qg8#
      • 1...Sg4
        • 2.Qg8#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINS(a)::QAR1(G)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(G);P_PINP(c)
      • Threat
        • QAR1(G),XP(c)
      • Vars
        • S(a);::S(D)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Vars
        • S(a);::S(D)
      • Refutation
        • S(a);
    • Try
      • Q(G);
      • Vars
        • S(a);N_GUARD::QAB1(G)
        • S(a);N_GUARD::QAB1(G),XS(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(C);
      • Vars
        • S(a);N_GUARD::QAR2(G)
        • S(a);N_GUARD::QAR2(G),XS(a)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(D);
    • Vars
      • K(b);OGATEB,P-FLIGHT,P_SPINS(a),XS(D)::QAR1(G)
      • P(c);OGATEB,SBLOCK,XS(D)::QAR2(G)
      • S(a);::QAB(G)
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