MESON Chess Problem Database

Problem Display
PID: 7104 (bR2Q1B1/1qP1P3/3N1P2/B2N3K/n2n1R1p/pkPPP3/prp5/br6 w - - 0 1)

Bonivento, Oscar

Fasano, Alessandro

L'Italia Scacchistica, 1998

bR2Q1B1/1qP1P3/3N1P2/B2N3K/n2n1R1p/pkPPP3/prp5/br6

#2

14 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Qb4
      • 2.Rxb4#
    • 1...Se2
      • 2.Qxa4#
    • 1...Sf3
      • 2.Qxa4#
    • 1...Sb5
      • 2.Rb4#
    • 1...Sf5
      • 2.Qxa4#
    • 1...Sc6
      • 2.Sb6#
    • 1...Se6
      • 2.Qxa4#
  • Tries
    • 1.Sb6+?
      • 1...Se6
        • 2.Qxa4#
        • 2.Qb5#
      • 1...Qd5+!
    • 1.Rxd4?
      • threat
        • 2.Sf4#
        • 2.Qxa4#
      • 1...Qxb8
        • 2.Qxa4#
      • 1...Sxc3
        • 2.Sxc3#
      • 1...c1Q
        • 2.Qxa4#
      • 1...c1S
        • 2.Qxa4#
      • 1...c1B
        • 2.Qxa4#
      • 1...c1R
        • 2.Qxa4#
      • 1...Qb4
        • 2.Rdxb4#
        • 2.Rbxb4#
      • 1...Qb5
        • 2.Rxb5#
        • 2.Qxb5#
      • 1...Qb6
        • 2.Qxa4#
      • 1...Rg1
        • 2.Qxa4#
      • 1...Sb6
        • 2.Rb4#
        • 2.Qb5#
      • 1...Sc5!
    • 1.Qb5+?
      • 1...Sxb5
        • 2.Rb4#
      • 1...Qxb5!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Sxd4#
      • 1...Sxf5
        • 2.Qxa4#
      • 1...Se2
        • 2.Qxa4#
      • 1...Sf3
        • 2.Qxa4#
      • 1...Sb5
        • 2.Rb4#
      • 1...Sc6
        • 2.Sb6#
      • 1...Se6
        • 2.Qxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 1
  • Sets
    • Q(k);OGATE::R1(L),XQ(k)
    • S(i);::QAB1(M),XS(h)
    • S(i);N_SPINQ(k),OGATE::R1(D)
    • S(i);N_GUARD::B(N)+S(F)
  • Tries
    • Try
      • S(F);CHECK,N_PINQ(k)
      • Refutation
        • Q(k);CHECK,P_SPINQ(k)
    • Try
      • R(D);XS(i)
      • Threat
        • DUALS(2)
      • Vars
        • Q(k);N_SPINQ(k),XR(L)::QAB1(M),XS(h)
        • S(h);XP(A)::B(N)+S(F),XS(h)
        • P(e);::QAB1(M),XS(h)
        • Q(k);::QAB1(M),XS(h)
        • R(b);::QAB1(M),XS(h)
      • Refutation
        • S(h);
    • Try
      • Q(M);CHECK,N_PINQ(k)
      • Vars
        • S(i);OGATE,XQ(M)::R1(D)
      • Refutation
        • Q(k);P_PINS(F),P_SPINQ(k),XQ(M)
  • Actual
    • S(H);
    • Threat
      • S(H),XS(i)
    • Vars
      • S(i);XS(H)::QAB1(M),XS(h)
      • S(i);::QAB1(M),XS(h)
      • S(i);N_SPINQ(k),OGATE::R1(D)
      • S(i);N_GUARD::B(N)+S(F)
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