MESON Chess Problem Database

Problem Display
PID: 31034 (1rnRrq2/p4N2/1p1p1B1p/1P1k1P2/2NP4/1P2p2K/1nQ3Pb/3R4 w - - 0 1)

Ellerman, Arnoldo

L'Italia Scacchistica, 1947

1rnRrq2/p4N2/1p1p1B1p/1P1k1P2/2NP4/1P2p2K/1nQ3Pb/3R4

#2

12 + 12

461 Schach-Express 1948

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd8
      • 2.Sxe3#
    • 1...Be5
      • 2.Sxe3#
    • 1...Sxc4
      • 2.bxc4#
    • 1...Se7
      • 2.Sxe3#
  • Tries
    • 1.Sd2?
      • threat
        • 2.Qc6#
      • 1...Be5
        • 2.Qe4#
      • 1...Sc4
        • 2.Qxc4#
        • 2.bxc4#
      • 1...Se7
        • 2.Qe4#
      • 1...Re5!
    • 1.Sa3?
      • threat
        • 2.Qc6#
      • 1...Sc4
        • 2.bxc4#
      • 1...Se7!
    • 1.Sa5?
      • threat
        • 2.Qc6#
      • 1...Sc4
        • 2.bxc4#
      • 1...Se7!
    • 1.Sxb6+?
      • 1...Sxb6
        • 2.Qc6#
      • 1...axb6
        • 2.Qc6#
      • 1...Rxb6!
  • Keys
    • 1.Scxd6!
      • threat
        • 2.Qc6#
      • 1...Se7
        • 2.Qe4#
      • 1...Sc4
        • 2.Qxc4#
        • 2.bxc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(k);N_GUARD,N_SPINP(f),XR(L)::S(F),XP(c)
    • B(b);S_CUTR(k)::S(F),XP(c)
    • S(a);OGATE,XS(F)::P(D),XS(a)
    • S(j);S_CUTR(k)::S(F),XP(c)
  • Tries
    • Try
      • S(F);
      • Threat
        • QAB1(B)
      • Vars
        • B(b);S_CUTR(k)::QAB1(B)
        • S(j);S_CUTR(k)::QAB1(B)
      • Refutation
        • R(k);
    • Try
      • S(F);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);OGATE::P(D),XS(a)
      • Refutation
        • S(j);
    • Try
      • S(F);
      • Threat
        • QAB1(B)
      • Vars
        • S(a);OGATE::P(D),XS(a)
      • Refutation
        • S(j);
    • Try
      • S(F);CHECK,XP(e)
      • Vars
        • S(j);XS(F)::QAB1(B)
        • P(h);XS(F)::QAB1(B)
      • Refutation
        • R(i);XS(F)
  • Actual
    • S(F);XP(f)
    • Threat
      • QAB1(B)
    • Vars
      • S(j);S_CUTR(k)::QAB1(B)
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