MESON Chess Problem Database

Problem Display
PID: 63678 (2N1RB1q/6pp/1pp5/2Pk3r/nPpN2R1/4Pn2/4Q3/K6b w - - 0 1)

Johnston, TS

Chess Amateur (The), 1909

2N1RB1q/6pp/1pp5/2Pk3r/nPpN2R1/4Pn2/4Q3/K6b

#2

10 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Re5
      • 2.Rd8#
    • 1...Sxd4
      • 2.Rxd4#
    • 1...Se5
      • 2.Se7#
    • 1...Sb2
      • 2.Sxb6#
    • 1...Sc3
      • 2.Sxb6#
    • 1...Sxc5
      • 2.Sxb6#
    • 1...c3
      • 2.Qa2#
  • Keys
    • 1.Qf2!
      • threat
        • 2.e4#
      • 1...Sxd4
        • 2.Rxd4#
      • 1...Sxc5
        • 2.Sxb6#
      • 1...c3
        • 2.Qa2#
      • 1...Sd2
        • 2.Qf7#
      • 1...Re5
        • 2.Rd8#
      • 1...Se1
        • 2.Qf7#
      • 1...Sg1
        • 2.Qf7#
      • 1...Sh2
        • 2.Qf7#
      • 1...Sh4
        • 2.Qf7#
      • 1...Se5
        • 2.Se7#
      • 1...Sg5
        • 2.Qf5#
      • 1...Sc3
        • 2.Sxb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(f);SBLOCK::R(I)
    • S(b);OGATE,XS(E)::R1(F),XS(b)
    • S(b);SBLOCK::S(H)
    • S(c);N_GUARD::S(H),XP(g)
    • S(c);N_GUARD,XP(G)::S(H),XP(g)
    • P(d);OGATEB::QAB(B)
  • Actual
    • Q(B);
    • Threat
      • P(C)
    • Vars
      • S(b);OGATE,XS(E)::R1(F),XS(b)
      • S(c);N_GUARD,XP(G)::S(H),XP(g)
      • P(d);OGATEB::QAB(B)
      • S(b);OGATE::QAB(B)
      • R(f);SBLOCK::R(I)
      • S(b);SBLOCK::S(H)
      • S(b);OGATE::QAR2(B)
      • S(c);N_GUARD::S(H),XP(g)
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