MESON Chess Problem Database

Problem Display
PID: 11197 (3N4/5N2/6p1/R5B1/1P2k3/2Pn4/6Pb/1K3Qn1 w - - 0 1)

Itzhaki, Daniel

Chess, 1937

3N4/5N2/6p1/R5B1/1P2k3/2Pn4/6Pb/1K3Qn1

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Sxd6#
    • 1...Se2
      • 2.Qxe2#
      • 2.Qf3#
    • 1...Sf3
      • 2.Qe2#
      • 2.Qxf3#
      • 2.gxf3#
    • 1...Sh3
      • 2.Qe2#
      • 2.Qf3#
    • 1...Sc1
      • 2.Qc4#
    • 1...Se1
      • 2.Qc4#
    • 1...Sf2
      • 2.Qc4#
    • 1...Sxb4
      • 2.Qc4#
    • 1...Sf4
      • 2.Re5#
    • 1...Se5
      • 2.Sd6#
  • Tries
    • 1.Qe1+?
      • 1...Se2
        • 2.Qxe2#
      • 1...Sxe1!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Rd4#
        • 2.Qxd3#
      • 1...Kxd5
        • 2.Qxd3#
      • 1...Sxb4
        • 2.Rd4#
        • 2.Qc4#
      • 1...Bf4
        • 2.Qxd3#
      • 1...Sf4
        • 2.Re5#
      • 1...Be5
        • 2.Qxd3#
      • 1...Se2
        • 2.Qf3#
      • 1...Sf3
        • 2.Qxd3#
        • 2.Qxf3#
      • 1...Sc1
        • 2.Rd4#
        • 2.Qc4#
      • 1...Se1
        • 2.Rd4#
        • 2.Qc4#
      • 1...Sb2
        • 2.Rd4#
      • 1...Sf2
        • 2.Qc4#
      • 1...Sc5
        • 2.Rd4#
        • 2.Qc4#
      • 1...Se5
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::S(H),XB(b)
    • S(c);OGATE::QAR2(B)
    • S(c);OGATE,XP(E)::QAR2(B)
    • S(c);N_GUARD,S_CUTB(b)::R1(F)
    • S(c);S_CUTB(b)::S(H)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B),XS(a)
      • Refutation
        • S(c);XQ(B)
  • Actual
    • R(F);
    • Threat
      • DUALS(2)
    • Vars
      • K(d);S_FLIGHT,XR(F)::QAR2(B),XS(c)
      • B(b);::QAB1(B),XS(c)
      • S(c);N_GUARD,S_CUTB(b)::R1(F)
      • S(a);N_GUARD::QAB1(B)
      • S(c);::R1(F)
      • S(c);OGATE::QAR2(B)
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