MESON Chess Problem Database

Problem Display
PID: 248135 (4Q3/B6K/p1B1N1N1/2n5/1pk5/4R2p/PPb4r/1qR5 w - - 0 1)

de Blasio, Francis JC

British Chess Magazine, 1946

4Q3/B6K/p1B1N1N1/2n5/1pk5/4R2p/PPb4r/1qR5

#2

10 + 8

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sb3
      • 2.axb3#
    • 1...Sd3
      • 2.Re4#
    • 1...Se4
      • 2.Se5#
    • 1...Sxe6
      • 2.Qxe6#
  • Tries
    • 1.Bb5+?
      • 1...Kd5
        • 2.Qc6#
      • 1...axb5!
    • 1.Rxc2+?
      • 1...Rxc2
        • 2.Se5#
      • 1...Qxc2!
    • 1.Re4+?
      • 1...Sxe4
        • 2.Se5#
      • 1...Kd3!
    • 1.Qd8?
      • threat
        • 2.Qd4#
        • 2.Qd5#
      • 1...Qxb2
        • 2.Qd5#
      • 1...Sxe6
        • 2.Qd3#
        • 2.Qd5#
      • 1...b3
        • 2.Qd4#
      • 1...Sb3
        • 2.Qd3#
        • 2.Qd5#
        • 2.axb3#
      • 1...Sd7
        • 2.Qh4#
      • 1...Rd2!
    • 1.Qf8?
      • threat
        • 2.Qxc5#
      • 1...Sb3
        • 2.axb3#
      • 1...Sd3
        • 2.Re4#
      • 1...Sa4
        • 2.Qf4#
      • 1...Se4
        • 2.Se5#
      • 1...Sb7
        • 2.Qf4#
      • 1...Sd7
        • 2.Qf4#
      • 1...Sxe6!
  • Keys
    • 1.Qe7!
      • threat
        • 2.Qxc5#
      • 1...Sxe6
        • 2.Qxe6#
      • 1...Sb3
        • 2.axb3#
      • 1...Sd3
        • 2.Re4#
      • 1...Sa4
        • 2.Qh4#
      • 1...Se4
        • 2.Se5#
      • 1...Sb7
        • 2.Qh4#
      • 1...Sd7
        • 2.Qh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(g);OGATE::P(B),XS(g)
    • S(g);N_GUARD,N_PINS(G),SBLOCK::R(D)
    • S(g);N_PINS(G)::S(G)
    • S(g);OGATE,XS(F)::QAB(J),XS(g)
  • Tries
    • Try
      • B(E);CHECK
      • Vars
        • K(f);N_SPINB(b),S_FLIGHT::QAB1(J)
      • Refutation
        • P(h);XB(E)
    • Try
      • R(A);CHECK,N_SPINS(G),XB(b)
      • Vars
        • R(c);XR(A)::S(G)
      • Refutation
        • Q(a);P_PINS(G),XR(A)
    • Try
      • R(D);CHECK,N_SPINS(G)
      • Vars
        • S(g);XR(D)::S(G)
      • Refutation
        • K(f);N_SPINB(b),S_FLIGHT
    • Try
      • Q(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(a);XP(C)::QAB1(J)
        • P(e);::QAR1(J)
        • S(g);N_GUARD::QAR(J)
      • Refutation
        • R(c);
    • Try
      • Q(J);
      • Threat
        • QAR1(J),XS(g)
      • Vars
        • S(g);OGATE::P(B),XS(g)
        • S(g);N_GUARD,N_PINS(G),SBLOCK::R(D)
        • S(g);N_GUARD::QAR(J)
        • S(g);N_PINS(G)::S(G)
      • Refutation
        • S(g);XS(F)
  • Actual
    • Q(J);
    • Threat
      • QAR1(J),XS(g)
    • Vars
      • S(g);OGATE,XS(F)::QAB(J),XS(g)
      • S(g);OGATE::P(B),XS(g)
      • S(g);N_GUARD,N_PINS(G),SBLOCK::R(D)
      • S(g);N_GUARD::QAR(J)
      • S(g);N_PINS(G)::S(G)
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