MESON Chess Problem Database

Problem Display
PID: 230839 (1q1B4/1p6/1pB1QN2/4b2N/3Pr3/2n1k1rR/2P2R1b/5K2 w - - 0 1)

Wennick, Einar

Stella Polaris, 1968

1q1B4/1p6/1pB1QN2/4b2N/3Pr3/2n1k1rR/2P2R1b/5K2

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Kxd4
      • 2.Bxb6#
    • 1...Bxd4
      • 2.Sg4#
  • Tries
    • 1.Sg4+?
      • 1...Kxd4
        • 2.Bxb6#
      • 1...Rxg4!
    • 1.Re2+?
      • 1...Kf3
        • 2.Qg4#
      • 1...Kxd4
        • 2.Bxb6#
      • 1...Sxe2!
    • 1.Qc4?
      • threat
        • 2.Qd3#
        • 2.Qxc3#
      • 1...Bxd4
        • 2.Qd3#
      • 1...Se2
        • 2.Qd3#
      • 1...Sb1
        • 2.Sd5#
        • 2.Qd3#
      • 1...Sd1
        • 2.Sd5#
        • 2.Qd3#
      • 1...Sa2
        • 2.Sd5#
        • 2.Qd3#
      • 1...Sa4
        • 2.Sd5#
        • 2.Qd3#
      • 1...Sb5
        • 2.Sd5#
        • 2.Qd3#
      • 1...Sd5
        • 2.Sxd5#
        • 2.Qd3#
      • 1...Rxd4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qxc3#
      • 1...Kxd4
        • 2.Bxb6#
      • 1...Rxd4
        • 2.Re2#
      • 1...Bxd4
        • 2.Sd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);N_SPINR(d),OGATEB,S_FLIGHT,XP(E)::B(J),XP(g)
    • B(f);SBLOCK,S_CUTR(e),XP(E)::S(I)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(c);N_SPINR(d),S_FLIGHT,XP(E)::B(J),XP(g)
      • Refutation
        • R(e);P_SPINB(f),XS(I)
    • Try
      • R(C);CHECK
      • Vars
        • K(c);P-FLIGHT::QAB1(H)
        • K(c);N_SPINR(d),S_FLIGHT,XP(E)::B(J),XP(g)
      • Refutation
        • S(b);XR(C)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(f);XP(E)::QAR1(H)
        • S(b);::QAR1(H)
      • Refutation
        • R(e);XP(E)
  • Actual
    • Q(H);P_PINS(b)
    • Threat
      • QAR2(H),XS(b)
    • Vars
      • K(c);N_SPINR(d),N_SPINS(b),OGATEB,S_FLIGHT,XP(E)::B(J),XP(g)
      • R(e);SBLOCK,XP(E)::R1(C)
      • B(f);SBLOCK,XP(E)::S(I)
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