MESON Chess Problem Database

Problem Display
PID: 88518 (5b2/p6K/2N5/PPkP1R2/1nPn4/6Q1/BPN1p2B/8 w - - 0 1)

Hermanson, Halvar

Buletin Problemistic, 1973

5b2/p6K/2N5/PPkP1R2/1nPn4/6Q1/BPN1p2B/8

#2

12 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bd6
      • 2.Qxd6#
    • 1...Bh6
      • 2.Qd6#
    • 1...Bg7
      • 2.Qd6#
    • 1...Sxd5
      • 2.Rxd5#
      • 2.Qa3#
      • 2.b4#
  • Tries
    • 1.S6xb4?
      • threat
        • 2.Sd3#
        • 2.Sa6#
      • 1...Sb3
        • 2.Qc7#
      • 1...e1S
        • 2.Sa6#
      • 1...a6
        • 2.Sd3#
        • 2.Sxa6#
      • 1...Sxc2!
    • 1.Qf2?
      • threat
        • 2.Qxd4#
      • 1...Sxc2
        • 2.d6#
      • 1...Sxc6
        • 2.dxc6#
      • 1...Bg7!
    • 1.Qc7?
      • threat
        • 2.Qxa7#
      • 1...Sxa2
        • 2.S6xd4#
      • 1...Sbxc6
        • 2.b4#
      • 1...Sdxc6
        • 2.Bg1#
      • 1...Sb3
        • 2.S6xb4#
      • 1...a6
        • 2.Qb6#
        • 2.Qa7#
      • 1...Sxb5!
    • 1.Qg1?
      • threat
        • 2.Qxd4#
      • 1...Sxc2
        • 2.d6#
      • 1...Sxc6
        • 2.dxc6#
      • 1...Bg7!
    • 1.d6+?
      • 1...Sd5
        • 2.Rxd5#
        • 2.Qa3#
        • 2.b4#
      • 1...Sxf5!
  • Keys
    • 1.Qe3!
      • threat
        • 2.Qxd4#
      • 1...Sxc2
        • 2.d6#
      • 1...Sxc6
        • 2.dxc6#
      • 1...Bg7
        • 2.Qe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • B(f);N_GUARD::QAB1(E),XB(f)
    • B(f);N_GUARD::QAB1(E)
  • Tries
    • Try
      • S(K);XS(b)
      • Threat
        • DUALS(2)
      • Vars
        • S(c);N_GUARD::QAR2(E)
        • P(a);::S(K)
      • Refutation
        • S(c);XS(C)
    • Try
      • Q(E);P_PINS(c)
      • Threat
        • QAB1(E),XS(c)
      • Vars
        • S(b);N_GUARD,XS(C)::R(J)+P(I)
        • S(b);OGATE,XS(K)::R(J)+P(I),XS(b)
      • Refutation
        • B(f);
    • Try
      • Q(E);
      • Threat
        • QAB(E),XP(e)
      • Vars
        • S(b);N_GUARD,XB(A)::QAR(E)+S(K),XS(c)
        • S(b);OGATE,P_SPINS(b),XS(K)::P(B)
        • S(c);OGATEB,P_SPINS(c),XS(K)::B(D)
        • S(c);N_GUARD::QAR(E)+S(K),XS(b)
      • Refutation
        • S(c);XP(H)
    • Try
      • Q(E);P_PINS(c)
      • Threat
        • QAB1(E),XS(c)
      • Vars
        • S(b);N_GUARD,XS(C)::R(J)+P(I)
        • S(b);OGATE,XS(K)::R(J)+P(I),XS(b)
      • Refutation
        • B(f);
    • Try
      • P(I);CHECK
      • Refutation
        • S(c);XR(J)
  • Actual
    • Q(E);P_PINS(c)
    • Threat
      • QAB1(E),XS(c)
    • Vars
      • S(b);N_GUARD,XS(C)::R(J)+P(I)
      • S(b);OGATE,XS(K)::R(J)+P(I),XS(b)
      • B(f);N_GUARD::QAB(E)
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