MESON Chess Problem Database

Problem Display
PID: 163624 (8/B1p5/2rP1P2/6KQ/PNknN2R/Pp2p1p1/1Pbr4/2R1q1b1 w - - 0 1)

Fokin, Yuri Georgievich

Sachmatija, 2005

8/B1p5/2rP1P2/6KQ/PNknN2R/Pp2p1p1/1Pbr4/2R1q1b1

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Se2
      • 2.Sxd2#
    • 1...Sb5
      • 2.Sxd2#
    • 1...Sf5
      • 2.Sxd2#
  • Tries
    • 1.Kh6?
      • threat
        • 2.Qd5#
      • 1...Rxd6
        • 2.Qc5#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Se2
        • 2.Sxd2#
        • 2.Qb5#
      • 1...Sf3
        • 2.Sxd2#
        • 2.Qb5#
      • 1...Sb5
        • 2.Sxd2#
        • 2.Qxb5#
      • 1...Se6
        • 2.Sxd2#
        • 2.Qb5#
      • 1...Sf5+!
    • 1.Sxd2+?
      • 1...Qxd2
        • 2.Qf7#
      • 1...exd2!
  • Keys
    • 1.Kg6!
      • threat
        • 2.Qd5#
      • 1...Rxd6
        • 2.Qc5#
      • 1...Rc5
        • 2.Qxc5#
      • 1...Se2
        • 2.Qb5#
      • 1...Sf3
        • 2.Qb5#
      • 1...Sb5
        • 2.Qxb5#
      • 1...Sf5
        • 2.Sxd2#
      • 1...Se6
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • S(i);::R(G)+S(F),DCHECK,XR(d)
  • Tries
    • Try
      • K(H);S_FLIGHT
      • Threat
        • QAB1(I)
      • Vars
        • R(j);N_GUARD,P_PINP(K),XP(J)::QAR1(I)
        • R(j);N_GUARD::QAR1(I),XR(j)
      • Refutation
        • S(i);CHECK
    • Try
      • S(F);CHECK,P_PINS(i),XR(d)
      • Vars
        • Q(a);XS(F)::QAB(I)
      • Refutation
        • P(f);XS(F)
  • Actual
    • K(H);P-FLIGHT,P_SPINS(F)
    • Threat
      • QAB1(I)
    • Vars
      • R(j);N_GUARD,P_PINP(K),XP(J)::QAR1(I)
      • R(j);N_GUARD::QAR1(I),XR(j)
      • S(i);N_GUARD::QAB1(I)
      • S(i);N_GUARD::QAB1(I),XS(i)
      • S(i);N_PINS(F)::R(G)+S(F),DCHECK,XR(d)
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