MESON Chess Problem Database

Problem Display
PID: 63447 (3R1q1B/2Q1p3/3bBp2/1p3NN1/RP3k1P/5p1P/3P4/K7 w - - 0 1)

Hassberg, Eric Manfred

Chess, 1945

3R1q1B/2Q1p3/3bBp2/1p3NN1/RP3k1P/5p1P/3P4/K7

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Be5+
      • 2.Rd4#
  • Tries
    • 1.Rxd6?
      • threat
        • 2.Rd3#
        • 2.Rd4#
        • 2.Rd5#
        • 2.Rda6#
        • 2.Rb6#
        • 2.Rc6#
        • 2.Rd7#
        • 2.Rd8#
      • 1...Ke5
        • 2.Rd3#
        • 2.Rd4#
        • 2.Rd5#
        • 2.Rda6#
        • 2.Rb6#
        • 2.Rc6#
        • 2.Rd7#
        • 2.Rd8#
      • 1...fxg5
        • 2.Rd4#
      • 1...Qb8
        • 2.Rd4#
      • 1...Qc8
        • 2.Rd4#
      • 1...Qd8
        • 2.Rd4#
        • 2.Rxd8#
      • 1...exd6!
    • 1.Qc4+?
      • 1...Ke5
        • 2.Sxf3#
        • 2.Qd4#
        • 2.Qe4#
      • 1...bxc4!
  • Keys
    • 1.Qc1!
      • threat
        • 2.d4#
      • 1...Ke5
        • 2.d4#
      • 1...Bxb4
        • 2.Qc7#
      • 1...fxg5
        • 2.d3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • B(d);CHECK,OGATE::R(K)
  • Tries
    • Try
      • R(K);XB(d)
      • Threat
        • DUALS(8)
      • Vars
        • P(e);XS(H)::QAB(J)+R(K),DCHECK
        • Q(g);::QAB(J)+R(K),DCHECK
      • Refutation
        • P(f);P_SPINP(f),XR(K)
    • Try
      • Q(J);CHECK,N_PINB(d)
      • Refutation
        • P(c);XQ(J)
  • Actual
    • Q(J);N_PINB(d)
    • Threat
      • QAB(J)+P(B)
    • Vars
      • K(b);P_SPINP(e),S_FLIGHT::P(B)
      • B(d);OGATEB,P_SPINB(d),XP(E)::QAB(J)
      • P(e);XS(H)::QAB(J)+P(B)
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