MESON Chess Problem Database

Problem Display
PID: 156934 (1rb5/B2pQn2/1r6/6R1/3k4/N5p1/1n1P4/1KN3b1 w - - 0 1)

Akerblom, Johan Axel

Karlov Chess Club, 1924

1rb5/B2pQn2/1r6/6R1/3k4/N5p1/1n1P4/1KN3b1

#2

7 + 9

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Bxb6#
    • 1...Bh2
      • 2.Qe3#
    • 1...Be3
      • 2.Qxe3#
    • 1...Bb7
      • 2.Bxb6#
    • 1...Sd1+
      • 2.Qb4#
    • 1...Sd3+
      • 2.Sb3#
    • 1...Sa4+
      • 2.Qb4#
    • 1...Sc4+
      • 2.Sb5#
    • 1...Se5
      • 2.Qxe5#
    • 1...Sd6
      • 2.Qe5#
    • 1...Sh6
      • 2.Qe5#
    • 1...Sd8
      • 2.Qe5#
    • 1...Sh8
      • 2.Qe5#
  • Tries
    • 1.Kc2?
      • threat
        • 2.Se2#
        • 2.Sb3#
      • 1...Se5
        • 2.Qxe5#
      • 1...Ba6
        • 2.Sb3#
      • 1...Sxg5!
    • 1.Qf6+?
      • 1...Se5
        • 2.Qxe5#
      • 1...Ke4!
    • 1.Qe2?
      • threat
        • 2.Sb3#
        • 2.Sc2#
        • 2.Sb5#
        • 2.Qg4#
      • 1...Sd1+
        • 2.Sb3#
        • 2.Sb5#
      • 1...Sd3+
        • 2.Sb3#
      • 1...Sa4+
        • 2.Sb3#
        • 2.Sb5#
      • 1...Sc4+
        • 2.Sb3#
        • 2.Sb5#
      • 1...Be3
        • 2.Qxe3#
      • 1...Se5
        • 2.Qxe5#
      • 1...d5
        • 2.Sb3#
      • 1...Ba6
        • 2.Sb3#
        • 2.Sc2#
        • 2.Qg4#
      • 1...Bb7
        • 2.Sb3#
        • 2.Sc2#
        • 2.Sb5#
        • 2.Bxb6#
      • 1...Sd6
        • 2.Sb3#
        • 2.Sc2#
        • 2.Qe5#
      • 1...Sh6
        • 2.Sb3#
        • 2.Sc2#
        • 2.Sb5#
        • 2.Qe5#
      • 1...d6
        • 2.Sb3#
        • 2.Sc2#
        • 2.Sb5#
      • 1...Sxg5!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qh4#
      • 1...Sd1+
        • 2.Qb4#
      • 1...Sd3+
        • 2.Sb3#
      • 1...Sa4+
        • 2.Qb4#
      • 1...Sc4+
        • 2.Sb5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Be3
        • 2.Qxe3#
      • 1...Bb7
        • 2.Bxb6#
      • 1...Sg5
        • 2.Qe5#
      • 1...Sd6
        • 2.Qe5#
      • 1...Sh6
        • 2.Qe5#
      • 1...d5
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • R(h);N_GUARD::B(F),XR(e)
    • B(a);N_GUARD::QAB1(G)
    • B(a);N_GUARD::QAB1(G),XB(a)
    • B(i);S_CUTR(h)::B(F),XR(e)
    • S(b);CHECK,N_GUARD::QAR2(G)
    • S(b);CHECK,SBLOCK::S(B)
    • S(b);CHECK,SBLOCK::S(D)
    • S(g);N_GUARD::QAB1(G),XS(g)
    • S(g);N_GUARD::QAB1(G)
  • Tries
    • Try
      • K(A);S_FLIGHT
      • Threat
        • DUALS(2)
      • Vars
        • S(g);N_GUARD::QAB1(G),XS(g)
        • B(i);::S(B)
      • Refutation
        • S(g);XR(E)
    • Try
      • Q(G);CHECK
      • Vars
        • S(g);N_GUARD,P_SPINS(g)::QAB1(G),XS(g)
      • Refutation
        • K(d);N_SPINR(e),P-FLIGHT
    • Try
      • Q(G);
      • Threat
        • DUALS(4)
      • Vars
        • S(b);CHECK::S(B)
        • B(a);N_GUARD::QAB1(G),XB(a)
        • S(g);N_GUARD::QAB1(G),XS(g)
        • P(f);::S(B)
      • Refutation
        • S(g);XR(E)
  • Actual
    • R(E);
    • Threat
      • QAR(G)
    • Vars
      • S(b);CHECK,N_GUARD::QAR2(G)
      • S(b);CHECK,SBLOCK::S(B)
      • S(b);CHECK,SBLOCK::S(D)
      • S(g);N_GUARD::QAB1(G),XS(g)
      • B(a);N_GUARD::QAB1(G),XB(a)
      • B(i);S_CUTR(h)::B(F),XR(e)
      • S(g);N_GUARD::QAB1(G)
      • P(f);SBLOCK::R(E)
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