MESON Chess Problem Database

Problem Display
PID: 232832 (6RK/R3Np1p/4Nk2/5n2/3Pp2r/2p5/B4Bnb/2q2Q2 w - - 0 1)

Ellerman, Arnoldo

Il Due Mosse, 1952

6RK/R3Np1p/4Nk2/5n2/3Pp2r/2p5/B4Bnb/2q2Q2

#2

9 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sge3
      • 2.Bxh4#
    • 1...Sfe3
      • 2.Bxh4#
    • 1...Sxd4
      • 2.Bxd4#
    • 1...Sd6
      • 2.Bxh4#
    • 1...Sh6
      • 2.Bxh4#
    • 1...Sxe7
      • 2.Bxh4#
    • 1...Sg7
      • 2.Bxh4#
  • Tries
    • 1.Sd8?
      • threat
        • 2.Sd5#
      • 1...Sxd4
        • 2.Bxd4#
      • 1...Sxe7
        • 2.Bxh4#
      • 1...Sg7
        • 2.Bxh4#
      • 1...Sge3
        • 2.Bxh4#
      • 1...Sfe3
        • 2.Bxh4#
      • 1...Sg3
        • 2.Qa6#
      • 1...Sd6
        • 2.Bxh4#
      • 1...Sh6
        • 2.Bxh4#
      • 1...Sf4!
    • 1.Sf8?
      • threat
        • 2.Sd5#
      • 1...Sxd4
        • 2.Bxd4#
      • 1...Sxe7
        • 2.Bxh4#
      • 1...Sg7
        • 2.Bxh4#
      • 1...Sge3
        • 2.Bxh4#
      • 1...Sfe3
        • 2.Bxh4#
      • 1...Sg3
        • 2.Qa6#
      • 1...Sd6
        • 2.Bxh4#
      • 1...Sh6
        • 2.Sxh7#
        • 2.Bxh4#
      • 1...Sf4!
    • 1.Bxh4+?
      • 1...Qg5
        • 2.Bxg5#
        • 2.Qxf5#
      • 1...Sxh4!
    • 1.Rg6+?
      • 1...fxg6
        • 2.Sg8#
      • 1...hxg6+!
    • 1.Rg7?
      • threat
        • 2.Sg8#
      • 1...Sxd4
        • 2.Bxd4#
      • 1...Sxe7
        • 2.Bxh4#
      • 1...Sxg7
        • 2.Bxh4#
      • 1...Sfe3
        • 2.Bxh4#
      • 1...Sd6
        • 2.Bxh4#
      • 1...Sh6
        • 2.Bxh4#
      • 1...Sg3!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Sd5#
      • 1...Sxd4
        • 2.Bxd4#
      • 1...Sxe7
        • 2.Bxh4#
      • 1...Sg7
        • 2.Bxh4#
      • 1...Sge3
        • 2.Bxh4#
      • 1...Sf4
        • 2.Sxe4#
      • 1...Sfe3
        • 2.Bxh4#
      • 1...Sg3
        • 2.Qa6#
      • 1...Sd6
        • 2.Bxh4#
      • 1...Sh6
        • 2.Bxh4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,S_CUTQ(a)::B(C),XR(f)
    • S(g);::QAR(A)+B(C),DCHECK,XR(f)
    • S(g);OGATE,XP(D)::QAR(A)+B(C),DCHECK,XS(g)
    • S(g);XS(G)::QAR(A)+B(C),DCHECK,XR(f)
  • Tries
    • Try
      • S(E);
      • Threat
        • S(G)
      • Vars
        • S(g);OGATE,XP(D)::QAR(A)+B(C),DCHECK,XS(g)
        • S(g);XS(G)::QAR(A)+B(C),DCHECK,XR(f)
        • S(g);::QAR(A)+B(C),DCHECK,XR(f)
        • S(b);N_GUARD,S_CUTQ(a)::B(C),XR(f)
        • S(g);N_GUARD,S_CUTB(c)::QAR(A)
      • Refutation
        • S(b);
    • Try
      • S(E);
      • Threat
        • S(G)
      • Vars
        • S(g);OGATE,XP(D)::QAR(A)+B(C),DCHECK,XS(g)
        • S(g);XS(G)::QAR(A)+B(C),DCHECK,XR(f)
        • S(g);::QAR(A)+B(C),DCHECK,XR(f)
        • S(b);N_GUARD,S_CUTQ(a)::B(C),XR(f)
        • S(g);N_GUARD,S_CUTB(c)::QAR(A)
      • Refutation
        • S(b);
    • Try
      • B(C);CHECK,P_PINS(g),XR(f)
      • Refutation
        • S(b);XB(C)
    • Try
      • R(H);CHECK
      • Vars
        • P(i);SBLOCK,XR(H)::S(G)
      • Refutation
        • P(j);CHECK,XR(H)
    • Try
      • R(H);
      • Threat
        • S(G)
      • Vars
        • S(g);OGATE,XP(D)::QAR(A)+B(C),DCHECK,XS(g)
        • S(g);XS(G)::QAR(A)+B(C),DCHECK,XR(f)
        • S(g);XR(H)::QAR(A)+B(C),DCHECK,XR(f)
        • S(g);::QAR(A)+B(C),DCHECK,XR(f)
      • Refutation
        • S(g);
  • Actual
    • S(E);
    • Threat
      • S(G)
    • Vars
      • S(g);OGATE,XP(D)::QAR(A)+B(C),DCHECK,XS(g)
      • S(g);XS(G)::QAR(A)+B(C),DCHECK,XR(f)
      • S(g);::QAR(A)+B(C),DCHECK,XR(f)
      • S(b);N_GUARD,S_CUTQ(a)::B(C),XR(f)
      • S(b);S_CUTR(f)::S(E),XP(e)
      • S(g);N_GUARD,S_CUTB(c)::QAR(A)
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