MESON Chess Problem Database

Problem Display
PID: 65911 (8/1Br3n1/2Ppp3/1p1k2K1/1P1p2Np/3Q4/1N6/7b w - - 0 1)

Anonymous

The Chess Monthly (Hoffer), 1881

8/1Br3n1/2Ppp3/1p1k2K1/1P1p2Np/3Q4/1N6/7b

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rd7
      • 2.cxd7#
      • 2.c7#
    • 1...Re7
      • 2.c7#
    • 1...Rf7
      • 2.c7#
    • 1...Rc8
      • 2.c7#
    • 1...Bf3
      • 2.Qxf3#
    • 1...Be4
      • 2.Qxb5#
      • 2.Qb3#
  • Tries
    • 1.Qf1?
      • threat
        • 2.Qxh1#
      • 1...Ke4
        • 2.Qxh1#
      • 1...d3
        • 2.Qxd3#
      • 1...Rf7
        • 2.c7#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Be4
        • 2.Qxb5#
      • 1...e5!
  • Keys
    • 1.Qh3!
      • threat
        • 2.Qxh1#
      • 1...Ke4
        • 2.Qxh1#
      • 1...d3
        • 2.Qxd3#
      • 1...e5
        • 2.Sf6#
      • 1...Bg2
        • 2.Qxg2#
      • 1...Rf7
        • 2.c7#
      • 1...Bf3
        • 2.Qxf3#
      • 1...Be4
        • 2.Qb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(h);OGATE::B(G)+P(F)
    • B(a);N_GUARD::QAB(B),XB(a)
  • Tries
    • Try
      • Q(B);N_PINP(b)
      • Threat
        • QAB(B),XB(a)
      • Vars
        • K(e);S_FLIGHT::QAB(B),XB(a)
        • P(b);OGATEB::QAR2(B),XP(b)
        • R(h);OGATE::B(G)+P(F)
        • B(a);N_GUARD::QAB(B),XB(a)
        • B(a);SBLOCK::QAR2(B),XP(d)
      • Refutation
        • P(g);
  • Actual
    • Q(B);N_PINP(b)
    • Threat
      • QAB(B),XB(a)
    • Vars
      • K(e);S_FLIGHT::QAB(B),XB(a)
      • P(b);OGATEB::QAR2(B),XP(b)
      • P(g);SBLOCK::S(D)
      • B(a);N_GUARD::QAB(B),XB(a)
      • R(h);OGATE::B(G)+P(F)
      • B(a);SBLOCK::QAB(B)
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