MESON Chess Problem Database

Problem Display
PID: 239794 (2QKn3/3NB1b1/1p1Pk1p1/R1p1p3/8/1N2P3/5r2/1B3R2 w - - 0 1)

Cristoffanini, Guido

L'Italia Scacchistica, 1931

2QKn3/3NB1b1/1p1Pk1p1/R1p1p3/8/1N2P3/5r2/1B3R2

#2

10 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sxb6#
    • 1...Ra2
      • 2.Sxb6#
    • 1...Rb2
      • 2.Sxb6#
    • 1...Rc2
      • 2.Sxb6#
    • 1...Rd2
      • 2.Sxb6#
    • 1...Re2
      • 2.Sxb6#
    • 1...Rg2
      • 2.Sxb6#
    • 1...Rh2
      • 2.Sxb6#
    • 1...Rf7
      • 2.Sxb6#
      • 2.Sf6#
    • 1...Rf8
      • 2.Sxb6#
    • 1...c4
      • 2.Sxe5#
      • 2.Qxc4#
  • Tries
    • 1.Sbxc5+?
      • 1...Kd5
        • 2.Sxb6#
      • 1...Kf7
        • 2.Ba2#
      • 1...bxc5!
    • 1.Sdxc5+?
      • 1...Kf7
        • 2.Qe6#
      • 1...Kd5!
    • 1.Sf8+?
      • 1...Kf7
        • 2.Qe6#
      • 1...Kd5!
  • Keys
    • 1.Ba2!
      • threat
        • 2.Sd4#
      • 1...Kd5
        • 2.Sd2#
      • 1...Kf5
        • 2.Sdxc5#
      • 1...Kf7
        • 2.Sbxc5#
      • 1...Rxa2
        • 2.Sxb6#
      • 1...c4
        • 2.Sxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • K(e);P_SPINP(b),S_FLIGHT::S(G),XP(d)
    • R(a);::QAB(I)+S(G),XP(d)
  • Tries
    • Try
      • S(C);CHECK,XP(b)
      • Vars
        • K(e);S_FLIGHT::S(G),XP(d)
        • K(e);P_SPINR(a),S_FLIGHT::B(A)
      • Refutation
        • P(d);XS(C)
    • Try
      • S(G);CHECK,XP(b)
      • Vars
        • K(e);P_SPINR(a),S_FLIGHT::QAB1(I)
      • Refutation
        • K(e);S_FLIGHT
    • Try
      • S(G);CHECK
      • Vars
        • K(e);P_SPINR(a),S_FLIGHT::QAB1(I)
      • Refutation
        • K(e);P_SPINP(b),S_FLIGHT
  • Actual
    • B(A);
    • Threat
      • B(A)+S(C),DCHECK
    • Vars
      • K(e);P_SPINP(b),S_FLIGHT::B(A)+S(C)
      • K(e);P_SPINR(a),S_FLIGHT::QAB(I)+S(G),XP(b)
      • K(e);P_SPINR(a),S_FLIGHT::B(A)+S(C),XP(b)
      • R(a);XB(A)::QAB(I)+S(G),XP(d)
      • P(b);::QAB(I)+S(G),XP(c)
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