MESON Chess Problem Database

Problem Display
PID: 31818 (8/1N6/r5p1/1p1pN3/1k1p2K1/pB1Q4/8/brB5 w - - 0 1)

Cassinelli, A

De Problemist, 1927

8/1N6/r5p1/1p1pN3/1k1p2K1/pB1Q4/8/brB5

#2

6 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Sc6#
    • 1...Ra5
      • 2.Sc6#
    • 1...Rc6
      • 2.Sxc6#
    • 1...Ra7
      • 2.Sc6#
    • 1...Ra8
      • 2.Sc6#
  • Tries
    • 1.Bxa3+?
      • 1...Rxa3
        • 2.Sc6#
      • 1...Kxa3!
    • 1.Qc2?
      • threat
        • 2.Sd3#
      • 1...d3
        • 2.Sxd3#
      • 1...Rxb3!
    • 1.Qd2+?
      • 1...Kxb3
        • 2.Sc5#
      • 1...Bc3!
  • Keys
    • 1.Ba4!
      • threat
        • 2.Qxa3#
      • 1...Kxa4
        • 2.Qxa3#
      • 1...Rxc1
        • 2.Qb3#
      • 1...Rxa4
        • 2.Sc6#
      • 1...bxa4
        • 2.Bxa3#
      • 1...Bc3
        • 2.Qxb5#
      • 1...Rb2
        • 2.Qxd4#
      • 1...Rb3
        • 2.Qxb3#
      • 1...Bb2
        • 2.Qb3#
      • 1...a2
        • 2.Qa3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 4
  • Sets
    • R(h);N_GUARD::S(E)
    • R(h);N_GUARD::S(E),XR(h)
  • Tries
    • Try
      • B(A);CHECK,XP(c)
      • Vars
        • R(h);SBLOCK,XB(A)::S(E)
      • Refutation
        • K(d);S_FLIGHT,XB(A)
    • Try
      • Q(C);
      • Threat
        • S(E)
      • Vars
        • P(e);::S(E),XP(e)
      • Refutation
        • R(b);XB(B)
    • Try
      • Q(C);CHECK
      • Vars
        • K(d);P-FLIGHT,XB(B)::S(F)
      • Refutation
        • B(a);P_SPINB(a)
  • Actual
    • B(B);
    • Threat
      • QAB1(C),XP(c)
    • Vars
      • K(d);P-FLIGHT,XB(B)::QAR1(C),XP(c)
      • R(b);N_GUARD,XB(A)::QAR1(C)
      • R(h);N_GUARD,SBLOCK,XB(B)::S(E)
      • P(f);SBLOCK,XB(B)::B(A),XP(c)
      • B(a);SBLOCK::QAR1(C),XP(f)
      • R(b);S_CUTB(a)::QAR2(C),XP(e)
      • R(b);N_GUARD::QAR1(C),XR(b)
      • B(a);S_CUTR(b)::QAR1(C)
      • P(c);::QAB1(C)
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