MESON Chess Problem Database

Problem Display
PID: 246341 (2b1B3/pp1np3/3b4/1p1N3R/1pk3P1/rR4QK/N1P5/4n1B1 w - - 0 1)

Ekstrom, Sven Johan Adrian

Sjakk-Nytt, 1946

2b1B3/pp1np3/3b4/1p1N3R/1pk3P1/rR4QK/N1P5/4n1B1

#2

10 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb3
      • 2.Qxb3#
      • 2.cxb3#
    • 1...Bxg3
      • 2.Rxb4#
    • 1...Bf4
      • 2.Rxb4#
      • 2.Qxf4#
    • 1...Bc7
      • 2.Rxb4#
    • 1...Bb8
      • 2.Rxb4#
    • 1...Sxc2
      • 2.Qd3#
    • 1...Sg2
      • 2.Qd3#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sc5
      • 2.Rxb4#
  • Tries
    • 1.Sb6+?
      • 1...Sxb6
        • 2.Bxb5#
      • 1...axb6!
    • 1.Bf7?
      • threat
        • 2.Sb6#
        • 2.Sxe7#
      • 1...Sc5
        • 2.Sb6#
        • 2.Rxb4#
      • 1...Se5
        • 2.Sb6#
        • 2.Qf4#
      • 1...Sb6
        • 2.Sxb6#
      • 1...Sf6
        • 2.Sb6#
      • 1...Sb8
        • 2.Sb6#
      • 1...Sf8
        • 2.Sb6#
      • 1...b6
        • 2.Sxb6#
        • 2.Sxe7#
      • 1...e5
        • 2.Sdc3#
        • 2.Sdxb4#
        • 2.Sf4#
        • 2.Sb6#
        • 2.Sf6#
        • 2.Sc7#
        • 2.Se7#
      • 1...e6!
  • Keys
    • 1.Sxe7!
      • threat
        • 2.Bf7#
      • 1...Sc5
        • 2.Rxb4#
      • 1...Se5
        • 2.Qf4#
      • 1...Sb6
        • 2.Bxb5#
      • 1...Sf6
        • 2.Bxb5#
      • 1...Sb8
        • 2.Bxb5#
      • 1...Sf8
        • 2.Bxb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 6
  • Sets
    • B(f);N_GUARD,XQ(E)::R1(D),XP(c)
    • B(f);N_GUARD::R1(D),XP(c)
    • S(a);N_GUARD,XP(C)::QAB1(E)
    • S(a);N_GUARD::QAB1(E)
    • S(a);N_GUARD::QAB1(E),XS(a)
    • S(i);P_PINP(G),S_CUTB(f)::R1(D),XP(c)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • S(i);OGATE,P_PINP(G),XS(H)::B(J),XP(e)
      • Refutation
        • P(g);XS(H)
    • Try
      • B(J);
      • Threat
        • DUALS(2)
      • Vars
        • S(i);P_PINP(G)::B(J)+S(H),DCHECK,XS(i)
        • S(i);P_PINP(G)::B(J)+S(H),DCHECK
      • Refutation
        • P(j);
  • Actual
    • S(H);XP(j)
    • Threat
      • B(J)
    • Vars
      • S(i);P_PINP(G),S_CUTB(f)::R1(D),XP(c)
      • S(i);P_PINP(G),S_CUTB(f)::QAR(E)
      • S(i);OGATE,P_PINP(G)::B(J),XP(e)
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