MESON Chess Problem Database

Problem Display
PID: 40537 (2B1k3/2Pp1pPn/K2p2r1/1N1n4/1p5B/6Q1/8/8 w - - 0 1)

Mari, Alberto

L'Illustrazione Italiana, 1920

2B1k3/2Pp1pPn/K2p2r1/1N1n4/1p5B/6Q1/8/8

#2

7 + 8

3360 Simple Two-move Themes 1924

SOLUTION

  • SOUND
  • Sets
    • 1...Rxg3
      • 2.Sxd6#
    • 1...Rg4
      • 2.Sxd6#
    • 1...Sxc7+
      • 2.Sxc7#
    • 1...f5
      • 2.Qxg6#
  • Tries
    • 1.Qe1+?
      • 1...Re6
        • 2.Sxd6#
      • 1...Se7
        • 2.Qxe7#
      • 1...Se3!
    • 1.Qe5+?
      • 1...Re6
        • 2.Sxd6#
      • 1...Se7
        • 2.Qxe7#
      • 1...dxe5+!
    • 1.Qe3+?
      • 1...Re6
        • 2.Sxd6#
      • 1...Se7
        • 2.Qxe7#
      • 1...Sxe3!
  • Keys
    • 1.Qxd6!
      • threat
        • 2.Bxd7#
      • 1...Rxd6+
        • 2.Sxd6#
      • 1...Sxc7+
        • 2.Sxc7#
      • 1...f5
        • 2.Qxg6#
      • 1...f6
        • 2.Qxd7#
      • 1...Sb6
        • 2.Qe7#
      • 1...Sdf6
        • 2.Qe5#
      • 1...Shf6
        • 2.Qf8#
      • 1...Sf8
        • 2.gxf8Q#
        • 2.gxf8R#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 2
  • Sets
    • R(d);N_GUARD,XQ(A)::S(C),XP(c)
    • R(d);N_GUARD::S(C),XP(c)
    • S(b);CHECK,XP(E)::S(C),XS(b)
    • P(f);OGATEB::QAB(A),XR(d)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • R(d);P_SPINR(d)::S(C),XP(c)
        • S(b);N_GUARD,P_SPINS(b)::QAR1(A),XS(b)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(A);CHECK
      • Vars
        • R(d);P_SPINR(d)::S(C),XP(c)
        • S(b);N_GUARD,P_SPINS(b)::QAR1(A),XS(b)
      • Refutation
        • P(c);CHECK,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • R(d);P_SPINR(d)::S(C),XP(c)
        • S(b);N_GUARD,P_SPINS(b)::QAR1(A),XS(b)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);P_SPINQ(A),XP(c)
    • Threat
      • B(G),XP(e)
    • Vars
      • R(d);CHECK,XQ(A)::S(C),XR(d)
      • S(b);CHECK,XP(E)::S(C),XS(b)
      • P(f);::QAB(A),XR(d)
      • P(f);N_PINQ(A)::QAB1(A),XP(e)
      • S(b);N_PINQ(A)::QAR1(A)
      • S(b);N_PINQ(A)::QAR(A)
      • S(g);N_PINQ(A)::QAR1(A)
      • S(g);OGATE::PXS(g)=Q
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