MESON Chess Problem Database

Problem Display
PID: 40480 (K7/3p4/6QB/5r2/R2N4/3knP1b/NR1Pp1p1/4r1q1 w - - 0 1)

Eddy, Edwin John

Recomm., BCF 028. Ty., 1938-1939

K7/3p4/6QB/5r2/R2N4/3knP1b/NR1Pp1p1/4r1q1

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sd1
      • 2.Sc1#
    • 1...Sf1
      • 2.Rb3#
    • 1...Sc2
      • 2.Rb3#
    • 1...Sg4
      • 2.Rb3#
      • 2.Qxf5#
    • 1...Sd5
      • 2.Qa6#
  • Tries
    • 1.Sxf5?
      • threat
        • 2.Rd4#
      • 1...Sxf5
        • 2.Qa6#
      • 1...Sd1
        • 2.Sc1#
        • 2.Qa6#
      • 1...Sf1
        • 2.Qa6#
      • 1...Sc2
        • 2.Rb3#
        • 2.Qa6#
      • 1...Sc4
        • 2.Sb4#
      • 1...Sg4
        • 2.Se3#
        • 2.Sg3#
        • 2.Sd4#
        • 2.Sh4#
        • 2.Sd6#
        • 2.Se7#
        • 2.Sg7#
        • 2.Qa6#
      • 1...Sd5
        • 2.Qa6#
      • 1...Bxf5!
    • 1.Sc6?
      • threat
        • 2.Se5#
        • 2.Rd4#
      • 1...Qh2
        • 2.Rd4#
      • 1...Sd1
        • 2.Sc1#
        • 2.Se5#
      • 1...Sf1
        • 2.Se5#
      • 1...Sc2
        • 2.Se5#
        • 2.Rb3#
      • 1...Sc4
        • 2.Sab4#
      • 1...Sg4
        • 2.Qxf5#
      • 1...Sd5
        • 2.Se5#
      • 1...d6
        • 2.Rd4#
      • 1...dxc6!
    • 1.Qxf5+?
      • 1...Sxf5
        • 2.Rb3#
      • 1...Bxf5!
    • 1.Qa6+?
      • 1...Sc4
        • 2.Qxc4#
      • 1...Rb5!
  • Keys
    • 1.Sc2!
      • threat
        • 2.Rd4#
      • 1...Kxd2
        • 2.Rd4#
      • 1...Sxc2
        • 2.Rb3#
      • 1...Sd1
        • 2.Sc1#
      • 1...Sf1
        • 2.Sxe1#
      • 1...Sc4
        • 2.Sab4#
      • 1...Sg4
        • 2.Qxf5#
      • 1...Sd5
        • 2.Qa6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(f);S_CUTR(a)::S(A)
    • S(f);::R(B)
    • S(f);N_GUARD::QAB(G)
  • Tries
    • Try
      • S(F);XR(h)
      • Threat
        • R1(E)
      • Vars
        • S(f);N_GUARD,P_SPINS(f),XS(F)::QAB(G)
        • S(f);N_GUARD::QAB(G)
        • S(f);SBLOCK::S(A)
      • Refutation
        • B(g);P_SPINB(g),XS(F)
    • Try
      • S(F);
      • Threat
        • DUALS(2)
      • Vars
        • Q(b);::R1(E)
        • S(f);::S(F)
        • S(f);SBLOCK::S(A)
        • S(f);N_GUARD,S_CUTB(g)::QAB(G),XR(h)
        • P(i);::R1(E)
      • Refutation
        • P(i);XS(F)
    • Try
      • Q(G);CHECK,XR(h)
      • Vars
        • S(f);XQ(G)::R(B)
      • Refutation
        • B(g);XQ(G)
    • Try
      • Q(G);CHECK,N_PINR(h)
      • Vars
        • S(f);N_GUARD,P_SPINS(f)::QAB1(G),XS(f)
      • Refutation
        • R(h);P_SPINR(h)
  • Actual
    • S(F);
    • Threat
      • R1(E)
    • Vars
      • K(e);N_SPINR(h),P-FLIGHT,P_SPINS(f),XP(C)::R(E)
      • S(f);SBLOCK,XS(F)::R(B)
      • S(f);S_CUTR(a)::S(A)
      • S(f);S_CUTQ(b)::S(F),XR(a)
      • S(f);SBLOCK::S(A)
      • S(f);N_GUARD,S_CUTB(g)::QAB(G),XR(h)
      • S(f);N_GUARD::QAB(G)
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