MESON Chess Problem Database

Problem Display
PID: 248110 (4B1q1/2pNb3/8/3k1n2/K1NpR3/8/2Q5/8 w - - 0 1)

Hermanson, Halvar

2nd HM., White MT (A), 1952-1953

4B1q1/2pNb3/8/3k1n2/K1NpR3/8/2Q5/8

#2

6 + 6

14867 BCPS Library 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bc5
      • 2.Sf6#
    • 1...c5
      • 2.Sdb6#
    • 1...c6
      • 2.Re5#
  • Tries
    • 1.Scb6+?
      • 1...Kd6
        • 2.Qc5#
      • 1...cxb6!
    • 1.Sdb6+?
      • 1...cxb6
        • 2.Re5#
      • 1...Kc5!
  • Keys
    • 1.Sd6!
      • threat
        • 2.Qc5#
      • 1...Kxd6
        • 2.Qc5#
      • 1...Bxd6
        • 2.Sf6#
      • 1...Sxd6
        • 2.Re5#
      • 1...cxd6
        • 2.Sb6#
      • 1...c5
        • 2.Qxc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(e);N_GUARD,SBLOCK::S(E)
    • P(d);N_GUARD,SBLOCK::S(E)
    • P(d);SBLOCK::R1(D)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(b);P-FLIGHT::QAB1(A)
      • Refutation
        • P(d);XS(C)
    • Try
      • S(E);CHECK
      • Vars
        • P(d);XS(E)::R1(D)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • K(b);P-FLIGHT,XS(C)::QAB1(A)
      • B(e);N_GUARD,SBLOCK,XS(C)::S(E)
      • S(c);SBLOCK,XS(C)::R1(D)
      • P(d);N_GUARD,SBLOCK,XS(C)::S(E)
      • P(d);::QAR1(A),XP(d)
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