MESON Chess Problem Database

Problem Display
PID: 65930 (2N1Bb2/3pP1p1/N1R3P1/p2knR2/P2p2p1/3n3b/2Q3P1/5K2 w - - 0 1)

Ahlbom, [Adolf] Leonard

British Chess Magazine, 1889

2N1Bb2/3pP1p1/N1R3P1/p2knR2/P2p2p1/3n3b/2Q3P1/5K2

#2

11 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Bxg2+
      • 2.Qxg2#
    • 1...Sc1
      • 2.Sc7#
      • 2.Sb6#
      • 2.Bf7#
      • 2.Rd6#
    • 1...Se1
      • 2.Sc7#
      • 2.Sb6#
      • 2.Bf7#
      • 2.Rd6#
    • 1...Sb2
      • 2.Sc7#
      • 2.Sb6#
      • 2.Bf7#
      • 2.Rd6#
    • 1...Sf2
      • 2.Sc7#
      • 2.Sb6#
      • 2.Bf7#
      • 2.Rd6#
    • 1...Sb4
      • 2.Sc7#
      • 2.Sb6#
      • 2.Bf7#
      • 2.Rd6#
    • 1...Sf4
      • 2.Sc7#
      • 2.Sb6#
      • 2.Rd6#
    • 1...Sc5
      • 2.Rd6#
    • 1...dxc6
      • 2.Qxc6#
  • Tries
    • 1.Rxe5+?
      • 1...Sxe5
        • 2.Sc7#
        • 2.Sb6#
        • 2.Rd6#
      • 1...Kxe5!
    • 1.Qb3+?
      • 1...Kxc6
        • 2.Qb5#
      • 1...Ke4!
    • 1.Qxd3?
      • threat
        • 2.Rd6#
      • 1...Kxc6
        • 2.Qe4#
        • 2.Qb5#
      • 1...Bxe7
        • 2.Sxe7#
      • 1...dxc6
        • 2.Bf7#
      • 1...d6
        • 2.Sc7#
        • 2.Rxd6#
      • 1...Bxg2+!
  • Keys
    • 1.Qe2!
      • 1...Bxg2+
        • 2.Qxg2#
      • 1...Kxc6
        • 2.Qe4#
      • 1...Bxe7
        • 2.Sxe7#
      • 1...dxc6
        • 2.Bf7#
      • 1...Sc1
        • 2.Rd6#
      • 1...Se1
        • 2.Rd6#
      • 1...Sb2
        • 2.Rd6#
      • 1...Sf2
        • 2.Rd6#
      • 1...Sb4
        • 2.Rd6#
      • 1...Sf4
        • 2.Rd6#
      • 1...Sc5
        • 2.Rd6#
      • 1...g3
        • 2.Qf3#
      • 1...d6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 10
    • REMOVED MATES = 0
  • Sets
    • B(b);CHECK,OGATE,XP(C)::QAB(B),XB(b)
    • S(a);::R1(G)
    • P(h);OGATE,XR(G)::QAB1(B),XP(h)
  • Tries
    • Try
      • R(E);CHECK,XS(g)
      • Refutation
        • K(f);P-FLIGHT,XR(E)
    • Try
      • Q(B);CHECK
      • Vars
        • K(f);N_SPINS(g),P_SPINP(h),S_FLIGHT,XR(G)::QAB1(B)
      • Refutation
        • K(f);N_SPINS(g),S_FLIGHT
    • Try
      • Q(B);P_PINP(c),XS(a)
      • Threat
        • R1(G)
      • Vars
        • B(j);XP(I)::S(J),XB(j)
        • P(h);SBLOCK,XR(G)::B(K)
      • Refutation
        • B(b);CHECK,XP(C)
  • Actual
    • Q(B);
    • Vars
      • B(b);CHECK,OGATE,XP(C)::QAB(B),XB(b)
      • K(f);N_SPINS(g),P_SPINP(h),S_FLIGHT,XR(G)::QAB(B)
      • B(j);XP(I)::S(J),XB(j)
      • P(h);SBLOCK,XR(G)::B(K)
      • S(a);::R1(G)
      • P(d);N_GUARD::QAB(B)
      • P(h);::S(F)
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