MESON Chess Problem Database

Problem Display
PID: 154397 (3R2K1/1R6/8/8/N1p1pBQ1/pN6/qpkP2p1/1b5B w - - 0 1)

Pochtarev, Konstantin Grigorevich

Shakhmatnaya kompozitsiya, 1995

3R2K1/1R6/8/8/N1p1pBQ1/pN6/qpkP2p1/1b5B

#2

9 + 8

5007 Zadachi i Etyudi 1995

SOLUTION

  • SOUND
  • Sets
    • 1...g1Q
      • 2.Bxe4#
    • 1...g1S
      • 2.Bxe4#
    • 1...g1B
      • 2.Bxe4#
    • 1...g1R
      • 2.Bxe4#
    • 1...cxb3
      • 2.Rc7#
  • Tries
    • 1.Sd4+?
      • 1...Kd3
        • 2.Sc5#
        • 2.Qe2#
      • 1...Kc1!
    • 1.Bxg2?
      • threat
        • 2.Bxe4#
      • 1...cxb3
        • 2.Rc7#
      • 1...e3
        • 2.Be4#
      • 1...Qxb3!
  • Keys
    • 1.d4!
      • threat
        • 2.Qe2#
      • 1...Kd3
        • 2.Qd1#
      • 1...cxd4 ep
        • 2.Rc8#
      • 1...exd4 ep
        • 2.Sd4#
      • 1...g1Q
        • 2.Bxe4#
      • 1...g1S
        • 2.Bxe4#
      • 1...g1R
        • 2.Bxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(e);OGATE,P_PINQ(F)::B(A),XP(h)
    • P(e);OGATE::B(A),XP(h)
    • P(g);OGATEB,SBLOCK,XS(C)::R(G)
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(d);P-FLIGHT
    • Try
      • B(A);XP(e)
      • Threat
        • B(A),XP(h)
      • Vars
        • P(g);OGATEB,SBLOCK,XS(C)::R(G)
        • P(h);::B(A)
      • Refutation
        • Q(b);XS(C)
  • Actual
    • P(B);
    • Threat
      • QAR2(F)
    • Vars
      • K(d);S_FLIGHT::QAR2(F)
      • P(g);EP,OGATEB,P_PINS(C),XP(B)::R(H)
      • P(h);EP,XP(B)::S(C)
      • P(e);OGATE,P_PINQ(F)::B(A),XP(h)
      • P(e);OGATE::B(A),XP(h)
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