MESON Chess Problem Database

Problem Display
PID: 11460 (2B4K/5p2/2R1N2B/3pkpQ1/1r6/b1nrpb2/4p3/1q1R4 w - - 0 1)

Hassberg, Eric Manfred

1st Prize, BCF 033. Ty., 1939-1940

2B4K/5p2/2R1N2B/3pkpQ1/1r6/b1nrpb2/4p3/1q1R4

#2

7 + 12

70 American Chess Problemist 1950
3098 FIDE Album (1914-1944) (I) 1971
14869 British Championship Solving Ty. 2012

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qf4#
  • Tries
    • 1.Bg7+?
      • 1...Ke4
        • 2.Sc5#
        • 2.Qf4#
      • 1...f6!
    • 1.Qf6+?
      • 1...Ke4
        • 2.Sc5#
      • 1...Kxf6!
    • 1.Qg7+?
      • 1...Ke4
        • 2.Sc5#
      • 1...f6!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qf4#
      • 1...Kxd4
        • 2.Qxe3#
      • 1...Ke4
        • 2.Qf4#
      • 1...Rdxd4
        • 2.Qe7#
      • 1...Rbxd4
        • 2.Qxf5#
      • 1...Be4
        • 2.Qf6#
      • 1...Se4
        • 2.Sxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(j);N_SPINP(k),P-FLIGHT::QAR1(B)
  • Tries
    • Try
      • B(E);CHECK
      • Refutation
        • P(l);
    • Try
      • Q(B);CHECK,N_PINP(k)
      • Vars
        • K(j);P-FLIGHT::S(D)
      • Refutation
        • K(j);S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK,N_PINP(k)
      • Vars
        • K(j);P-FLIGHT::S(D)
      • Refutation
        • P(l);P_SPINP(l)
  • Actual
    • S(D);
    • Threat
      • QAB1(B)
    • Vars
      • K(j);N_SPINP(k),P_SPINR(e),S_FLIGHT,XS(D)::QAB1(B),XP(f)
      • K(j);N_SPINP(k),P-FLIGHT::QAR1(B)
      • R(e);XS(D)::QAR2(B)
      • R(h);SBLOCK,XS(D)::QAR1(B),XP(k)
      • B(g);SBLOCK::QAB1(B)
      • S(d);SBLOCK::S(D),XB(g)
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