MESON Chess Problem Database

Problem Display
PID: 55448 (b2K4/1PB1Q3/r2n1p2/pPkB1R1p/R1Pn3q/5N2/8/8 w - - 0 1)

Mansfield, Comins

3rd Prize, L'Italia Scacchistica, 1974

b2K4/1PB1Q3/r2n1p2/pPkB1R1p/R1Pn3q/5N2/8/8

#2

10 + 9

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Qxd6#
    • 1...Sc2
      • 2.Be4#
      • 2.Bc6#
      • 2.Be6#
      • 2.Bf7#
      • 2.Bg8#
    • 1...Se2
      • 2.Be4#
      • 2.Bc6#
      • 2.Be6#
      • 2.Bf7#
      • 2.Bg8#
    • 1...Sb3
      • 2.Be4#
      • 2.Bc6#
      • 2.Be6#
      • 2.Bf7#
      • 2.Bg8#
    • 1...Sxb5
      • 2.Be4#
    • 1...Sc6+
      • 2.Bxc6#
    • 1...Se6+
      • 2.Bxe6#
  • Tries
    • 1.Bxd6+?
      • 1...Kb6
        • 2.Bc5#
      • 1...Rxd6+!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qa3#
      • 1...Sxb7+
        • 2.Bxb7#
      • 1...Sf7+
        • 2.Bxf7#
      • 1...Sxc4
        • 2.Bxc4#
      • 1...Sxb5
        • 2.Be4#
      • 1...Qe1
        • 2.Qxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD::QAB1(I),XS(g)
    • S(a);N_GUARD,XP(D)::R(F)+B(E)
    • S(a);CHECK,N_GUARD::R(F)+B(E),XS(a)
  • Tries
    • Try
      • B(H);CHECK,XS(g)
      • Vars
        • K(d);S_FLIGHT::B(H)
      • Refutation
        • R(f);CHECK,P_SPINR(f),XB(H)
  • Actual
    • Q(I);N_PINS(g),P_PINS(a)
    • Threat
      • QAB(I)
    • Vars
      • S(g);CHECK,OGATE,XP(G)::R(F)+B(E),XS(g)
      • S(g);CHECK,N_GUARD::R(F)+B(E),XS(g)
      • S(g);OGATE,XP(C)::R(F)+B(E),XS(g)
      • S(g);N_GUARD,XP(D)::R(F)+B(E)
      • Q(b);N_GUARD::QAB1(I),XS(a)
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