MESON Chess Problem Database

Problem Display
PID: 80614 (6Q1/4p1p1/1K1PNP2/1Rp1kq1R/2P1N3/3ppP2/1r2r1P1/B7 w - - 0 1)

Kozdon, Baldur

Freie Presse, 1994

6Q1/4p1p1/1K1PNP2/1Rp1kq1R/2P1N3/3ppP2/1r2r1P1/B7

#2

12 + 9

6114 Problemschach-Jahrbuch (1994) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Qg5
      • 2.Rxg5#
    • 1...Re1
      • 2.Bxb2#
    • 1...d2
      • 2.Bxb2#
  • Tries
    • 1.S6xc5?
      • threat
        • 2.Se6#
      • 1...Kd4
        • 2.Sb3#
      • 1...Kf4
        • 2.Sxd3#
      • 1...e6
        • 2.Sxe6#
      • 1...exd6!
    • 1.Rxb2?
      • threat
        • 2.Rc2#
        • 2.Rd2#
        • 2.Rxe2#
      • 1...Rxb2+
        • 2.Bxb2#
      • 1...Rxg2
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rf2#
        • 2.Rxg2#
      • 1...Qg5
        • 2.Rxg5#
      • 1...Re1
        • 2.Rb1#
      • 1...Rc2
        • 2.Rxc2#
      • 1...Rd2
        • 2.Rc2#
        • 2.Rxd2#
      • 1...Rf2
        • 2.Rc2#
        • 2.Rd2#
        • 2.Re2#
        • 2.Rxf2#
      • 1...d2
        • 2.Rb1#
        • 2.Ra2#
        • 2.Rc2#
        • 2.Rxd2#
        • 2.Rb3#
        • 2.Rb4#
        • 2.Rb5#
      • 1...Qxh5!
  • Keys
    • 1.S4xc5!
      • threat
        • 2.Se4#
      • 1...Kxd6
        • 2.Qb8#
      • 1...Kxf6
        • 2.Qxg7#
      • 1...exd6
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(g);OGATEB::R(G),XQ(g)
    • R(b);N_GUARD::B(A),XR(a)
    • P(c);S_CUTR(b)::B(A),XR(a)
  • Tries
    • Try
      • S(J);XP(e)
      • Threat
        • R(F)+S(J)
      • Vars
        • K(f);N_SPINQ(g),S_FLIGHT::S(J)
        • K(f);N_SPINQ(g),N_SPINR(a),S_FLIGHT::S(J),XP(c)
        • P(h);::R(F)+S(J),XP(h)
      • Refutation
        • P(h);XP(I)
    • Try
      • R(F);N_PINP(e),N_SPINR(F),XR(a)
      • Threat
        • DUALS(3)
      • Vars
        • R(b);CHECK,OGATE,P_SPINR(b),XR(F)::B(A),XR(b)
        • Q(g);OGATEB::R(G),XQ(g)
        • R(b);N_GUARD::B(A)+R(F)
        • R(b);::B(A)+R(F),XR(b)
      • Refutation
        • Q(g);N_SPINQ(g),XR(G)
  • Actual
    • S(E);XP(e)
    • Threat
      • R(F)+S(E)
    • Vars
      • K(f);N_SPINQ(g),N_SPINR(a),OGATEB,S_FLIGHT,XP(I)::QAB(L)
      • K(f);N_SPINQ(g),OGATEB,S_FLIGHT,XP(K)::QAB1(L),XP(i)
      • P(h);SBLOCK,XP(I)::R(F)+S(E),DCHECK
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