MESON Chess Problem Database

Problem Display
PID: 139506 (2R5/1B6/3pN3/B7/2PP4/pkNrr1b1/p3Q1q1/K1Rb4 w - - 0 1)

Guida, Marco

The Problemist, 2010

2R5/1B6/3pN3/B7/2PP4/pkNrr1b1/p3Q1q1/K1Rb4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qxa2#
    • 1...Qh1
      • 2.Qxa2#
    • 1...Qf3
      • 2.Qxa2#
    • 1...Qh3
      • 2.Qxa2#
    • 1...Qe4
      • 2.Qxa2#
    • 1...Qd5
      • 2.Qxa2#
    • 1...Qc6
      • 2.Qxa2#
    • 1...Qxb7
      • 2.Qxa2#
    • 1...Qg1
      • 2.Qxa2#
    • 1...Rxd4
      • 2.Sxd4#
    • 1...Bf2
      • 2.Qxa2#
  • Tries
    • 1.Bd5?
      • threat
        • 2.Rb8#
      • 1...Qxd5
        • 2.Qxa2#
      • 1...Rxc3!
    • 1.Rb8?
      • threat
        • 2.Bd5#
      • 1...Kxc4
        • 2.Ba6#
      • 1...Qxb7
        • 2.Qxa2#
      • 1...Rxc3
        • 2.Bc6#
      • 1...Qd5
        • 2.Bxd5#
        • 2.Qxa2#
      • 1...Qc6
        • 2.Qxa2#
      • 1...d5!
    • 1.Qxd1+?
      • 1...Qc2
        • 2.Qxc2#
      • 1...Rxd1!
  • Keys
    • 1.Bc6!
      • threat
        • 2.Ba4#
      • 1...Kxc4
        • 2.Bd5#
      • 1...Qxc6
        • 2.Qxa2#
      • 1...Rxc3
        • 2.Rb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 10
  • Sets
    • Q(c);N_GUARD::QAB1(C),XP(b)
    • Q(c);N_GUARD,XB(I)::QAB1(C),XP(b)
    • R(f);XP(F)::S(H),XR(f)
    • B(h);S_CUTQ(c)::QAB1(C),XP(b)
  • Tries
    • Try
      • B(I);
      • Threat
        • R(J)
      • Vars
        • Q(c);N_GUARD,XB(I)::QAB1(C),XP(b)
      • Refutation
        • R(f);XS(D)
    • Try
      • R(J);
      • Threat
        • R(J)+B(I)
      • Vars
        • K(e);P_SPINR(f),S_FLIGHT,XP(E)::B(I)
        • Q(c);N_GUARD,P_SPINQ(c),XB(I)::QAB1(C),XP(b)
        • R(f);XS(D)::R(J)+B(I)
        • Q(c);N_GUARD::QAB1(C),XP(b)
      • Refutation
        • P(i);
    • Try
      • Q(C);CHECK,XB(a)
      • Vars
        • Q(c);N_GUARD,P_SPINQ(c)::QAB1(C),XQ(c)
      • Refutation
        • R(f);P_PINR(B),XQ(C)
  • Actual
    • B(I);
    • Threat
      • B(I)
    • Vars
      • K(e);OGATEB,P_SPINR(f),S_FLIGHT,XP(E)::R(J)+B(I),DCHECK
      • Q(c);N_GUARD,XB(I)::QAB1(C),XP(b)
      • R(f);XS(D)::R(J)
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