MESON Chess Problem Database

Problem Display
PID: 250193 (8/1Q4b1/3B4/KN1q4/1R1pk1B1/5n2/b3PP2/2N1n3 w - - 0 1)

Cassinelli, A

Shakhmaty, 1927

8/1Q4b1/3B4/KN1q4/1R1pk1B1/5n2/b3PP2/2N1n3

#2

9 + 7

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Sc3#
    • 1...Qxb7
      • 2.Sc3#
    • 1...Sc2
      • 2.exf3#
    • 1...Sg2
      • 2.exf3#
    • 1...Sd3
      • 2.exd3#
      • 2.exf3#
    • 1...Se5
      • 2.Rxd4#
  • Tries
    • 1.Sxa2?
      • threat
        • 2.Sc3#
      • 1...Se5
        • 2.Rxd4#
      • 1...Be5!
    • 1.Qxd5+?
      • 1...Bxd5
        • 2.Sc3#
      • 1...Kxd5!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Sc5#
      • 1...Qxb7
        • 2.Sc3#
      • 1...Sxd3
        • 2.exf3#
      • 1...Qc6
        • 2.Sc3#
      • 1...Be5
        • 2.Qh7#
      • 1...Se5
        • 2.Rxd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(f);N_PINS(G)::S(G)
    • Q(f);N_PINS(G),N_SPINQ(f),XQ(I)::S(G)
    • S(a);N_GUARD::P(B),XS(c)
    • S(c);N_GUARD,S_CUTB(g)::R1(D),XP(d)
  • Tries
    • Try
      • S(A);XB(b)
      • Threat
        • S(A)
      • Vars
        • S(c);N_GUARD,S_CUTB(g)::R1(D),XP(d)
      • Refutation
        • B(g);
    • Try
      • Q(I);CHECK,N_SPINS(G),XQ(f)
      • Vars
        • B(b);XQ(I)::S(G)
      • Refutation
        • K(e);N_SPINP(d),S_FLIGHT,XQ(I)
  • Actual
    • S(A);
    • Threat
      • S(A)
    • Vars
      • Q(f);N_PINS(G),N_SPINQ(f),XQ(I)::S(G)
      • S(a);N_GUARD,SBLOCK,XS(A)::P(B),XS(c)
      • Q(f);N_PINS(G)::S(G)
      • B(g);OGATE::QAB(I)
      • S(c);N_GUARD,S_CUTB(g)::R1(D),XP(d)
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