MESON Chess Problem Database

Problem Display
PID: 43757 (4Kb2/2p1pr2/2Nk1p2/B2q2Rr/2RNP3/8/n7/8 w - - 0 1)

Salardini, Erio

De Problemist, 1930

4Kb2/2p1pr2/2Nk1p2/B2q2Rr/2RNP3/8/n7/8

#2

7 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc6+
      • 2.Rxc6#
    • 1...Qe6
      • 2.Sb5#
    • 1...Rh1
      • 2.Rxd5#
    • 1...Rh2
      • 2.Rxd5#
    • 1...Rh3
      • 2.Rxd5#
    • 1...Rh4
      • 2.Rxd5#
    • 1...Rh6
      • 2.Rxd5#
    • 1...Rhh7
      • 2.Rxd5#
    • 1...Rh8
      • 2.Rxd5#
  • Tries
    • 1.Sb5+?
      • 1...Ke6
        • 2.exd5#
      • 1...Qxb5!
    • 1.Bb4+?
      • 1...Qc5
        • 2.Bxc5#
      • 1...Sxb4!
  • Keys
    • 1.Sd8!
      • threat
        • 2.Bxc7#
      • 1...Qc6+
        • 2.Rxc6#
      • 1...Qb5+
        • 2.Sxb5#
      • 1...Qxc4
        • 2.Sb7#
      • 1...Qxa5
        • 2.Sb7#
        • 2.Sxf7#
        • 2.Rc6#
      • 1...Qb7
        • 2.Sxb7#
        • 2.Sxf7#
      • 1...Qc5
        • 2.Sb7#
        • 2.Sxf7#
      • 1...c5
        • 2.Sb5#
      • 1...c6
        • 2.Sb7#
      • 1...e5
        • 2.Sf5#
      • 1...e6
        • 2.Sxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 8
  • Sets
    • Q(b);CHECK,OGATE,XS(F)::R1(A),XQ(b)
    • Q(b);N_GUARD,SBLOCK::S(B)
    • R(c);N_GUARD::R1(E),XQ(b)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(d);P-FLIGHT::P(C),XQ(b)
      • Refutation
        • Q(b);P_PINS(F),XS(B)
    • Try
      • B(D);CHECK
      • Vars
        • Q(b);N_GUARD,P_SPINQ(b)::B(D),XQ(b)
      • Refutation
        • S(a);XB(D)
  • Actual
    • S(F);
    • Threat
      • B(D),XP(f)
    • Vars
      • Q(b);CHECK,N_GUARD::R1(A),XQ(b)
      • Q(b);CHECK,N_GUARD::S(B),XQ(b)
      • Q(b);N_GUARD,XR(A)::S(F)
      • P(f);S_CUTQ(b)::S(B)
      • P(f);S_CUTQ(b)::S(F)
      • P(g);SBLOCK,S_CUTQ(b)::S(B)
      • P(g);S_CUTQ(b)::S(F),XR(h)
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