MESON Chess Problem Database

Problem Display
PID: 56079 (2Q5/3Rp3/3pp3/1K1p4/RppkPpN1/5P2/1n1P4/B7 w - - 0 1)

Mansfield, Comins

Probleemblad, 1981

2Q5/3Rp3/3pp3/1K1p4/RppkPpN1/5P2/1n1P4/B7

#2

9 + 9

4054 Complete Mansfield/III 1999
5454 Near Snap 2010

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qxc3#
    • 1...dxe4
      • 2.Qxc4#
  • Tries
    • 1.Sf2?
      • 1...Ke5
        • 2.Qh8#
      • 1...dxe4
        • 2.Qc5#
      • 1...b3
        • 2.Bxb2#
      • 1...c3
        • 2.Qxc3#
      • 1...e5!
    • 1.Bxb2+?
      • 1...c3
        • 2.Qxc3#
      • 1...Kd3!
  • Keys
    • 1.Se5!
      • 1...Kxe5
        • 2.Qh8#
      • 1...dxe4
        • 2.Qc5#
      • 1...dxe5
        • 2.Qxc4#
      • 1...b3
        • 2.Bxb2#
      • 1...c3
        • 2.Qxc3#

Anticipated by 70228(1922)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(c);N_SPINS(a),OGATE,P_SPINP(b)::QAB1(I),XP(c)
    • P(f);N_GUARD,P_SPINP(g),XP(E)::QAR1(I),XP(c)
  • Tries
    • Try
      • S(F);
      • Vars
        • K(d);S_FLIGHT::QAB(I)
        • P(f);P_SPINP(g),XP(E)::QAB1(I)
        • P(b);P_SPINP(c)::B(A),XS(a)
        • P(c);N_SPINS(a),OGATE,P_SPINP(b)::QAB1(I),XP(c)
      • Refutation
        • P(h);
    • Try
      • B(A);CHECK,XS(a)
      • Vars
        • P(c);OGATE,P_SPINP(c)::QAB1(I),XP(c)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(F);
    • Vars
      • K(d);OGATEB,S_FLIGHT,XS(F)::QAB(I)
      • P(f);P_SPINP(g),XP(E)::QAB1(I)
      • P(g);P_SPINP(f),SBLOCK,XS(F)::QAR1(I),XP(c)
      • P(b);P_SPINP(c)::B(A),XS(a)
      • P(c);N_SPINS(a),OGATE,P_SPINP(b)::QAB1(I),XP(c)
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