MESON Chess Problem Database

Problem Display
PID: 26002 (BQ4nK/BR6/5n2/p2r1p2/4kNp1/2pp4/5RP1/5bN1 w - - 0 1)

Gorbatenko, Yuri Grigorevich

Shanshin, Valery Yurevich

Prize, Diso, 1992

BQ4nK/BR6/5n2/p2r1p2/4kNp1/2pp4/5RP1/5bN1

#2

9 + 10

3705 Album Russia (1992-1994) 2000
3681 FIDE Album (1992-1994) 2001
56 The Problemist 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Re7#
    • 1...Rb5
      • 2.Re7#
    • 1...Re5
      • 2.Rb4#
    • 1...Rd6
      • 2.Re7#
    • 1...Rd7
      • 2.Rb4#
    • 1...Rd8
      • 2.Rb4#
      • 2.Re7#
    • 1...Sh6
      • 2.Re7#
    • 1...Se7
      • 2.Rxe7#
    • 1...a4
      • 2.Rb4#
  • Tries
    • 1.Sf3?
      • threat
        • 2.Sg5#
      • 1...gxf3
        • 2.gxf3#
      • 1...Rd4
        • 2.Re7#
        • 2.Qe5#
      • 1...Rc5
        • 2.Re7#
      • 1...Rd6
        • 2.Rb4#
      • 1...Sh7!
    • 1.Rb6?
      • threat
        • 2.Re6#
      • 1...Ke3
        • 2.Re6#
      • 1...Kd4
        • 2.Rb4#
      • 1...Sd7!
    • 1.Rc7?
      • threat
        • 2.Rc4#
      • 1...Ke5
        • 2.Re7#
      • 1...d2!
    • 1.Qe5+?
      • 1...Rxe5
        • 2.Rb4#
      • 1...Kxe5!
    • 1.Qe8+?
      • 1...Re5
        • 2.Rb4#
        • 2.Qa4#
      • 1...Se7
        • 2.Rxe7#
      • 1...Sxe8!
  • Keys
    • 1.Rf3!
      • threat
        • 2.Re3#
      • 1...gxf3
        • 2.gxf3#
      • 1...Rc5
        • 2.Rb4#
      • 1...Rd6
        • 2.Re7#
      • 1...Rd4
        • 2.Re7#
      • 1...Re5
        • 2.Rb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(g);::B(G)+R(F),DCHECK
    • S(j);N_GUARD::R(F)
    • S(j);N_GUARD::R(F),XS(j)
    • P(f);N_GUARD::R(F)
  • Tries
    • Try
      • S(A);
      • Threat
        • S(A)
      • Vars
        • P(e);OGATE,XS(A)::P(C),XP(e)
        • R(g);::B(G)+R(F),DCHECK
      • Refutation
        • S(i);
    • Try
      • R(F);P_PINR(g)
      • Threat
        • R(F)
      • Vars
        • K(d);N_SPINR(g),P-FLIGHT::B(E)+R(F),DCHECK
      • Refutation
        • S(i);
    • Try
      • R(F);P_PINR(g)
      • Threat
        • R(F)
      • Vars
        • K(d);N_SPINR(g),P-FLIGHT::QAB(H)+R(F),DCHECK
      • Refutation
        • P(c);
    • Try
      • Q(H);CHECK
      • Vars
        • R(g);SBLOCK,XQ(H)::B(G)+R(F),DCHECK
      • Refutation
        • K(d);P-FLIGHT,XQ(H)
    • Try
      • Q(H);CHECK
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::R(F),XS(j)
      • Refutation
        • S(i);XQ(H)
  • Actual
    • R(B);
    • Threat
      • R1(B)
    • Vars
      • P(e);OGATE,XR(B)::P(C),XP(e)
      • R(g);::B(G)+R(F),DCHECK
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