MESON Chess Problem Database

Problem Display
PID: 164575 (5BBQ/p5RP/2P5/3P3p/P1k5/1R2pK2/b1P2p2/3n1Nb1 w - - 0 1)

Erokhin, Vladimir Alekseevich

Novi Temi, 1979

5BBQ/p5RP/2P5/3P3p/P1k5/1R2pK2/b1P2p2/3n1Nb1

#2

12 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Rg4#
    • 1...Sc3
      • 2.Rb4#
    • 1...h4
      • 2.Rg4#
  • Tries
    • 1.Sd2+?
      • 1...Kd4
        • 2.Rxg1#
        • 2.Rg2#
        • 2.Rg3#
        • 2.Rg4#
        • 2.Rg5#
        • 2.Rg6#
        • 2.Rxa7#
        • 2.Rgb7#
        • 2.Rc7#
        • 2.Rd7#
      • 1...exd2!
    • 1.Sxe3+?
      • 1...Kd4
        • 2.Rxg1#
        • 2.Rg2#
        • 2.Rg3#
        • 2.Rg4#
        • 2.Rg5#
        • 2.Rg6#
        • 2.Rxa7#
        • 2.Rgb7#
        • 2.Rc7#
        • 2.Rd7#
        • 2.Rf7#
      • 1...Sxe3!
    • 1.Rg5?
      • threat
        • 2.Rb4#
        • 2.d6#
      • 1...Sc3
        • 2.Sxe3#
        • 2.Rxc3#
        • 2.Rb4#
        • 2.Qxc3#
      • 1...a5
        • 2.d6#
      • 1...Bxb3!
    • 1.Rgb7?
      • threat
        • 2.R3b4#
        • 2.R7b4#
      • 1...Bxb3
        • 2.Rb4#
      • 1...a5!
    • 1.Rf7?
      • threat
        • 2.Rf4#
      • 1...Kxd5
        • 2.Rc7#
      • 1...Sc3
        • 2.Sxe3#
      • 1...Bh2!
    • 1.d6+?
      • 1...Kd4
        • 2.Rg5#
      • 1...Kc5!
  • Keys
    • 1.Re7!
      • threat
        • 2.Re4#
      • 1...Kc5
        • 2.Re4#
      • 1...Sc3
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • K(f);P-FLIGHT::QAB(L)+R(H),DCHECK
    • S(a);SBLOCK::R1(C)
    • P(g);N_GUARD::R(H)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • P(e);XS(A)
    • Try
      • S(A);CHECK,XP(e)
      • Refutation
        • S(a);XS(A)
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(h);::B(K)+P(F)
      • Refutation
        • B(c);XR(C)
    • Try
      • R(H);
      • Threat
        • DUALS(2)
      • Vars
        • B(c);XR(C)::R1(H)
      • Refutation
        • P(h);
    • Try
      • R(H);
      • Threat
        • R(H)
      • Vars
        • K(f);OGATEB,S_FLIGHT,XP(F)::B(K)+R(H)
        • S(a);N_GUARD::S(A),XP(e)
      • Refutation
        • B(b);
    • Try
      • P(F);CHECK
      • Vars
        • K(f);P-FLIGHT::QAB(L)+R(H)
      • Refutation
        • K(f);P-FLIGHT
  • Actual
    • R(H);
    • Threat
      • R(H)
    • Vars
      • K(f);P-FLIGHT::B(J)+R(H)
      • S(a);N_GUARD::QAR1(L),XS(a)
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