MESON Chess Problem Database

Problem Display
PID: 221606 (6Qb/3p2N1/1K5B/2PRN3/4kppp/1PP3qp/3P3R/6n1 w - - 0 1)

Ellerman, Arnoldo

Suomen Shakki, 1959

6Qb/3p2N1/1K5B/2PRN3/4kppp/1PP3qp/3P3R/6n1

#2

11 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Re2#
    • 1...f3
      • 2.d3#
  • Tries
    • 1.Sf5?
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Qg6#
      • 1...d6
        • 2.Sxd6#
      • 1...Bxe5!
    • 1.Se8?
      • threat
        • 2.Sd6#
      • 1...Kf5
        • 2.Qg6#
      • 1...d6
        • 2.Sxd6#
      • 1...Bxe5!
    • 1.Re2+?
      • 1...Qe3
        • 2.d3#
      • 1...Sxe2!
    • 1.d3+?
      • 1...Ke3
        • 2.Sf5#
      • 1...Qxd3!
  • Keys
    • 1.Sf7!
      • threat
        • 2.Sg5#
      • 1...Kf3
        • 2.Sg5#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Sf3
        • 2.Sd6#
      • 1...f3
        • 2.Rd4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD,S_CUTQ(b)::R(B)
    • P(e);S_CUTQ(b)::P(A)
  • Tries
    • Try
      • S(J);
      • Threat
        • S(J)
      • Vars
        • K(d);OGATEB,S_FLIGHT,XS(J)::QAB1(K)
        • P(h);::S(J),XP(h)
      • Refutation
        • B(i);XS(G)
    • Try
      • S(J);
      • Threat
        • S(J)
      • Vars
        • K(d);S_FLIGHT::QAB1(K)
        • P(h);::S(J),XP(h)
      • Refutation
        • B(i);XS(G)
    • Try
      • R(B);CHECK
      • Vars
        • Q(b);P_PINP(E),P_SPINQ(b)::P(A)
      • Refutation
        • S(a);XR(B)
    • Try
      • P(A);CHECK
      • Vars
        • K(d);P-FLIGHT,P_SPINP(e)::S(J)
      • Refutation
        • Q(b);XP(A)
  • Actual
    • S(G);
    • Threat
      • S(G)
    • Vars
      • K(d);S_FLIGHT::S(G)
      • K(d);OGATEB,S_FLIGHT,XR(F)::QAB(K)
      • S(a);SBLOCK::S(G)
      • P(e);SBLOCK::R1(F)
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