MESON Chess Problem Database

Problem Display
PID: 237744 (K2B4/1p1R1B2/5P1n/3Pk1b1/R2p2pN/4P3/2bn1Nq1/2rr1Q2 w - - 0 1)

Ellerman, Arnoldo

Arbejder-Skak, 1952

K2B4/1p1R1B2/5P1n/3Pk1b1/R2p2pN/4P3/2bn1Nq1/2rr1Q2

#2

11 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd5
      • 2.Rxd5#
    • 1...Bf4
      • 2.exd4#
    • 1...Bxf6
      • 2.Bc7#
    • 1...Sf5
      • 2.Sg6#
  • Tries
    • 1.Sd3+?
      • 1...Ke4
        • 2.Re7#
      • 1...Bxd3!
  • Keys
    • 1.Se4!
      • threat
        • 2.Re7#
      • 1...Kxe4
        • 2.Re7#
      • 1...Qxe4
        • 2.Bc7#
      • 1...Bxe4
        • 2.exd4#
      • 1...Bxf6
        • 2.Qf4#
      • 1...Sxe4
        • 2.Sg6#
      • 1...Sxf7
        • 2.Qf5#
      • 1...Sf5
        • 2.Qxf5#
      • 1...Sg8
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • Q(e);OGATE,XP(F)::R1(H),XQ(e)
    • B(i);SBLOCK::P(C),XP(f)
    • B(i);SBLOCK,XP(G)::B(K)
    • S(j);SBLOCK,S_CUTB(c)::S(E)
  • Tries
    • Try
      • S(B);CHECK
      • Vars
        • K(h);P-FLIGHT,P_SPINP(f)::R(H)
      • Refutation
        • B(c);XS(B)
  • Actual
    • S(B);
    • Threat
      • R(H)
    • Vars
      • K(h);P-FLIGHT,P_SPINP(f),XS(B)::R(H)
      • Q(e);SBLOCK,XS(B)::B(K)
      • B(c);SBLOCK,XS(B)::P(C),XP(f)
      • B(i);N_GUARD,XP(G)::QAB1(A)
      • S(d);SBLOCK,XS(B)::S(E)
      • S(j);N_GUARD,XB(I)::QAR1(A)
      • S(j);N_GUARD::QAR1(A),XS(j)
      • S(j);N_GUARD::QAR1(A)
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