MESON Chess Problem Database

Problem Display
PID: 237307 (K2Bk2r/3p1N1p/4p2P/8/B6P/5RQ1/3r4/2b5 w k - 0 1)

Shanshin, Valery Yurevich

Schweizerische Schachzeitung, 2010

K2Bk2r/3p1N1p/4p2P/8/B6P/5RQ1/3r4/2b5

#2

8 + 7

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Sd6#
    • 1...Rg8
      • 2.Qxg8#
  • Tries
    • 1.Bg5?
      • threat
        • 2.Qb8#
      • 1...0-0+
        • 2.Bd8#
      • 1...Kf8
        • 2.Qb8#
      • 1...Rb2
        • 2.Sd6#
      • 1...Rc2
        • 2.Sd6#
      • 1...Rd6
        • 2.Sxd6#
      • 1...e5!
    • 1.Qd6?
      • threat
        • 2.Bxd7#
        • 2.Qe7#
      • 1...Ra2
        • 2.Qe7#
      • 1...Ba3
        • 2.Bxd7#
      • 1...Rxd6!
    • 1.Qg5?
      • threat
        • 2.Qe7#
      • 1...Kf8
        • 2.Sd6#
      • 1...Ba3!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Bg5#
      • 1...Kf8
        • 2.Bg5#
      • 1...0-0
        • 2.Qg3#
      • 1...Rb2
        • 2.Sd6#
      • 1...Rc2
        • 2.Sd6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • K(f);N_GUARD,N_SPINP(d),P-FLIGHT,S_CUTR(b)::R(A)+S(F)
    • R(g);N_GUARD::QAR2(B),XR(g)
  • Tries
    • Try
      • B(H);
      • Threat
        • QAR(B)
      • Vars
        • K(f);0-0,CHECK,N_SPINP(d),OGATEB::QAR(B)+B(H)
        • K(f);N_SPINP(d),P-FLIGHT::QAR(B)
        • R(b);N_GUARD::S(F)
        • R(b);N_GUARD::S(F),XR(b)
      • Refutation
        • P(c);
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • R(b);P_PINB(C)::QAR1(B)
        • B(a);::B(C),XP(d)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • K(f);N_SPINP(d),P-FLIGHT,S_CUTR(b)::R(A)+S(F)
      • Refutation
        • B(a);
  • Actual
    • Q(B);
    • Threat
      • QAR(B)+B(H)
    • Vars
      • K(f);N_SPINP(d),P-FLIGHT::QAR(B)+B(H)
      • K(f);0-0,N_SPINP(d),OGATEB::QAR(B)
      • R(b);N_GUARD::S(F)
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