MESON Chess Problem Database

Problem Display
PID: 11005 (8/b2P4/1Bb1P1K1/1RN1N1R1/2pkpQ2/5p2/5r2/1q1B4 w - - 0 1)

Nielsen, Kristian

2nd Prize, BCF 019. Ty., 1935-1936

8/b2P4/1Bb1P1K1/1RN1N1R1/2pkpQ2/5p2/5r2/1q1B4

#2

10 + 8

3098 FIDE Album (1914-1944) (I) 1971
56 The Problemist 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Kc3
      • 2.Sa4#
    • 1...Kd5
      • 2.Sxf3#
    • 1...Bb8
      • 2.Sa4#
      • 2.Sxe4#
    • 1...c3
      • 2.Sb3#
  • Tries
    • 1.Sxf3+?
      • 1...Kc3
        • 2.Qe5#
        • 2.Qf6#
      • 1...Rxf3!
    • 1.Qd2+?
      • 1...Qd3
        • 2.Sb3#
        • 2.Sxc6#
      • 1...Rxd2!
    • 1.Qe3+?
      • 1...Kd5
        • 2.Sf7#
      • 1...Kxe3!
  • Keys
    • 1.Qf6!
      • threat
        • 2.Sg4#
      • 1...e3+
        • 2.Sed3#
      • 1...Kc3
        • 2.Sxf3#
      • 1...Ke3
        • 2.Sxc4#
      • 1...Kd5
        • 2.Sf7#
      • 1...Bb8
        • 2.Sa4#
      • 1...c3
        • 2.Sb3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(e);N_SPINP(f),S_FLIGHT::S(D)
    • K(e);N_SPINP(f),P-FLIGHT::R(F)+S(E),XP(c)
    • P(d);SBLOCK::B(G)+S(D),DCHECK
  • Tries
    • Try
      • S(E);CHECK,XP(c)
      • Refutation
        • R(b);XS(E)
    • Try
      • Q(B);CHECK,N_PINP(f)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);CHECK,N_PINP(f)
      • Vars
        • K(e);P-FLIGHT::R(F)+S(E)
      • Refutation
        • K(e);S_FLIGHT,XQ(B)
  • Actual
    • Q(B);N_PINP(f)
    • Threat
      • QAB(B)+S(E)
    • Vars
      • P(f);CHECK,SBLOCK::QAB(B)+S(E)
      • K(e);S_FLIGHT::QAB(B)+S(E),XP(c)
      • K(e);S_FLIGHT::S(E),XP(d)
      • K(e);P-FLIGHT::R(F)+S(E)
      • B(h);N_GUARD::B(G)+S(D)
      • P(d);SBLOCK::B(G)+S(D),DCHECK
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