MESON Chess Problem Database

Problem Display
PID: 19176 (1r6/qQ6/2NP4/2p5/p1P1kPPn/RN5P/4rp2/2BB2bK w - - 0 1)

Hassberg, Eric Manfred

3rd HM., White MT (A), 1952-1953

1r6/qQ6/2NP4/2p5/p1P1kPPn/RN5P/4rp2/2BB2bK

#2

12 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sd2#
    • 1...Kf3
      • 2.Sxc5#
    • 1...Qa6
      • 2.Sxc5#
    • 1...Qxb7
      • 2.Sxc5#
    • 1...Qa8
      • 2.Sxc5#
  • Tries
    • 1.Bc2+?
      • 1...Kf3
        • 2.Sbd4#
      • 1...Rxc2!
    • 1.Qe7+?
      • 1...Kf3
        • 2.Sbd4#
        • 2.Qe3#
      • 1...Qxe7
        • 2.Sxc5#
      • 1...Kd3!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qd5#
      • 1...Kd3
        • 2.Sxc5#
      • 1...Kf3
        • 2.Sd2#
      • 1...Qxf7
        • 2.Sxc5#
      • 1...Rd2
        • 2.Sxd2#
      • 1...Re3
        • 2.Sd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • K(e);S_FLIGHT::R(D)+S(E)
    • K(e);P_SPINR(b),S_FLIGHT::R(D)+S(E),XP(g)
    • Q(h);N_GUARD::S(E),XP(g)
    • Q(h);N_GUARD,XQ(L)::S(E),XP(g)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • K(e);S_FLIGHT::R(D)+S(E),DCHECK
      • Refutation
        • R(b);XB(B)
    • Try
      • Q(L);CHECK
      • Vars
        • Q(h);XQ(L)::S(E),XP(g)
      • Refutation
        • K(e);S_FLIGHT
  • Actual
    • Q(L);
    • Threat
      • QAB1(L)
    • Vars
      • K(e);S_FLIGHT::R(D)+S(E),DCHECK,XP(g)
      • K(e);P_SPINR(b),S_FLIGHT::R(D)+S(E),DCHECK
      • Q(h);N_GUARD,XQ(L)::S(E),XP(g)
      • R(b);N_GUARD::S(E),XR(b)
      • R(b);N_GUARD::S(E)
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