MESON Chess Problem Database

Problem Display
PID: 75657 (2n1B3/2p1P3/2N2R1b/pRPkp3/p2Br2p/1P3Q1b/K3P1p1/1n1N4 w - - 0 1)

Mai, Guglielmo

L'Alfiere di Re, 1922

2n1B3/2p1P3/2N2R1b/pRPkp3/p2Br2p/1P3Q1b/K3P1p1/1n1N4

#2

12 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Sxe3#
    • 1...Bg7
      • 2.Se3#
    • 1...Bf8
      • 2.Se3#
    • 1...Sd2
      • 2.Sc3#
    • 1...Sa3
      • 2.Sc3#
    • 1...Sc3+
      • 2.Sxc3#
    • 1...Sb6
      • 2.cxb6#
    • 1...Sd6
      • 2.cxd6#
    • 1...axb3+
      • 2.Qxb3#
  • Tries
    • 1.Sb4+?
      • 1...Kxd4
        • 2.Qd3#
      • 1...axb4!
  • Keys
    • 1.Qd3!
      • threat
        • 2.Qc4#
      • 1...Rxe2+
        • 2.Bb2#
      • 1...Sc3+
        • 2.Sxc3#
      • 1...axb3+
        • 2.Qxb3#
      • 1...Rxd4
        • 2.e4#
      • 1...Re3
        • 2.Bxe3#
      • 1...Rf4
        • 2.Se3#
      • 1...Rg4
        • 2.Bf7#
      • 1...Sd2
        • 2.Sc3#
      • 1...Sa3
        • 2.Sc3#
      • 1...Sb6
        • 2.cxb6#
      • 1...Sd6
        • 2.cxd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 3
  • Sets
    • B(j);N_GUARD::S(A),XB(j)
    • B(j);N_GUARD::S(A)
    • S(a);N_GUARD::S(A)
    • S(a);CHECK,N_GUARD::S(A),XS(a)
    • S(l);OGATE::R(G)+P(H),XS(l)
    • P(d);CHECK,OGATE,XP(D)::QAB(E),XP(d)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(h);N_SPINR(e),P-FLIGHT,XB(F)::QAR1(E)
      • Refutation
        • P(g);XS(I)
  • Actual
    • Q(E);N_PINR(e)
    • Threat
      • QAB1(E)
    • Vars
      • R(e);CHECK,N_GUARD,XP(C)::QAR(E)+B(F)
      • S(a);CHECK,N_GUARD::S(A),XS(a)
      • P(d);CHECK,OGATE,XP(D)::QAB(E),XP(d)
      • R(e);OGATE,P_SPINR(e),XB(F)::P(C)
      • R(e);N_GUARD::QAR(E)+B(F),XR(e)
      • R(e);N_GUARD,S_CUTB(j)::S(A)
      • R(e);S_CUTB(c)::B(L)
      • S(a);N_GUARD::S(A)
      • S(l);OGATE::R(G)+P(H),XS(l)
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