MESON Chess Problem Database

Problem Display
PID: 225431 (1r1b4/1q2p3/p7/2B2n2/8/p3Q3/R1PNB1bP/1Nk3KR w - - 0 1)

Cuppini, Alessandro

3rd HM., Praca, 1993

(First published on Sat May 29 1993)

1r1b4/1q2p3/p7/2B2n2/8/p3Q3/R1PNB1bP/1Nk3KR

#2

10 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qc8
      • 2.Kxg2#
    • 1...Qxb1
      • 2.Kxg2#
      • 2.Sb3#
    • 1...Qb3
      • 2.Kxg2#
    • 1...Qb4
      • 2.Kxg2#
    • 1...Qb5
      • 2.Kxg2#
    • 1...Qb6
      • 2.Kxg2#
    • 1...Qa7
      • 2.Kxg2#
    • 1...Qc7
      • 2.Kxg2#
    • 1...Qd7
      • 2.Kxg2#
    • 1...Bb6
      • 2.Bxa3#
      • 2.Qxa3#
  • Tries
    • 1.Kf2+?
      • 1...Bf1
        • 2.Rxf1#
      • 1...Bxh1!
    • 1.Sxa3?
      • threat
        • 2.Sb3#
      • 1...Qb3
        • 2.Kxg2#
        • 2.Sxb3#
      • 1...Sxe3!
    • 1.Se4+?
      • 1...Kxb1
        • 2.Sc3#
      • 1...Sxe3!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Bxa3#
      • 1...Qxb3
        • 2.Kxg2#
      • 1...Qb4
        • 2.Kxg2#
      • 1...Qb6
        • 2.Kxg2#
      • 1...Qa7
        • 2.Kxg2#
      • 1...Bb6
        • 2.Qxa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 4
  • Sets
    • Q(f);::R(C)+K(B),XB(b)
  • Tries
    • Try
      • K(B);CHECK,S_FLIGHT
      • Vars
        • B(b);N_GUARD,P_SPINB(b)::R(C),XB(b)
      • Refutation
        • B(b);XR(C)
    • Try
      • S(A);XP(c)
      • Threat
        • QAB(I)+S(F),DCHECK
      • Refutation
        • S(d);XQ(I)
    • Try
      • S(F);CHECK
      • Vars
        • K(a);P-FLIGHT,XS(A)::S(F)
      • Refutation
        • S(d);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • B(J),XP(c)
    • Vars
      • Q(f);XQ(I)::R(C)+K(B),XB(b)
      • Q(f);::R(C)+K(B),XB(b)
      • Q(f);P_PINB(J)::R(C)+K(B),XB(b)
      • B(i);P_PINB(J),S_CUTQ(f)::QAB(I),XP(c)
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