MESON Chess Problem Database

Problem Display
PID: 259775 (3q1r2/2p1p3/r5QP/4k1pK/4p1P1/R3p3/B3NP2/8 w - - 0 1)

Colaneri, Bruno

Tolosa-100 MT (Problemas), 2016

3q1r2/2p1p3/r5QP/4k1pK/4p1P1/R3p3/B3NP2/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rxa3
      • 2.Qe6#
    • 1...Ra4
      • 2.Qe6#
    • 1...Ra5
      • 2.Qe6#
    • 1...Re6
      • 2.Qxe6#
    • 1...Ra7
      • 2.Qe6#
    • 1...Ra8
      • 2.Qe6#
    • 1...c6
      • 2.Qe6#
  • Tries
    • 1.Ra5+?
      • 1...Qd5
        • 2.Rxd5#
      • 1...Rxa5
        • 2.Qe6#
      • 1...c5!
    • 1.Qf5+?
      • 1...Kd6
        • 2.Qd5#
      • 1...Rxf5!
    • 1.Qxg5+?
      • 1...Kd6
        • 2.Qd5#
      • 1...Rf5!
  • Keys
    • 1.Qxe4+!
      • 1...Kxe4
        • 2.Rxe3#
      • 1...Kd6
        • 2.Qd5#
      • 1...Kf6
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(e);N_GUARD,XR(D)::QAR1(G)
    • R(e);N_GUARD::QAR1(G)
    • R(e);N_GUARD::QAR1(G),XR(e)
    • P(f);S_CUTR(e)::QAR1(G)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • Q(h);N_GUARD,P_SPINQ(h)::R1(D),XQ(h)
        • R(e);XR(D)::QAR1(G)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(G);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(G)
      • Refutation
        • R(i);XQ(G)
    • Try
      • Q(G);CHECK,XP(d)
      • Vars
        • K(c);OGATE,S_FLIGHT::QAR1(G)
      • Refutation
        • R(i);P_PINQ(G),P_SPINR(i)
  • Actual
    • Q(G);CHECK,XP(b)
    • Vars
      • K(c);N_GUARD,P-FLIGHT,XQ(G)::R1(D),XP(a)
      • K(c);N_GUARD,S_CUTQ(h),S_FLIGHT::QAR1(G)
      • K(c);N_GUARD,S_CUTR(i),S_FLIGHT::QAR1(G)
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