MESON Chess Problem Database

Problem Display
PID: 177992 (7K/1b4R1/2p2Q1p/4p2P/8/1NqpkB2/2P5/1n1R2bN w - - 0 1)

Pletenev, Nikolai Alexeyevich

2nd HM., Sahs (Latvia), 1986

7K/1b4R1/2p2Q1p/4p2P/8/1NqpkB2/2P5/1n1R2bN

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Re1#
      • 2.Rxd3#
    • 1...Qe1
      • 2.Rxe1#
      • 2.Rxd3#
    • 1...Qb2
      • 2.Re1#
      • 2.Rxd3#
    • 1...Qb4
      • 2.Rxd3#
    • 1...Qd4
      • 2.Re1#
    • 1...Qa5
      • 2.Rxd3#
    • 1...Qc4
      • 2.Re1#
    • 1...Qc5
      • 2.Re1#
      • 2.Rxd3#
    • 1...Sd2
      • 2.Re1#
  • Tries
    • 1.Bg4?
      • threat
        • 2.Qf3#
      • 1...Ke4
        • 2.Qf3#
      • 1...Qxb3
        • 2.Qxe5#
      • 1...Sd2
        • 2.Re1#
      • 1...e4
        • 2.Qxh6#
      • 1...c5!
    • 1.Rg4?
      • threat
        • 2.Re4#
      • 1...e4
        • 2.Rxe4#
      • 1...Qb4
        • 2.Rxd3#
      • 1...Qd4
        • 2.Re1#
      • 1...Qc4
        • 2.Re1#
      • 1...Sd2
        • 2.Re1#
      • 1...c5!
    • 1.Qxe5+?
      • 1...Kxf3
        • 2.Rg3#
      • 1...Qxe5!
    • 1.Qf5?
      • threat
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#
      • 1...Qb4
        • 2.Rxd3#
      • 1...Qd4
        • 2.Re1#
      • 1...Qc4
        • 2.Re1#
      • 1...Sd2
        • 2.Re1#
      • 1...c5!
  • Keys
    • 1.Rg3!
      • threat
        • 2.Qxh6#
      • 1...Qxb3
        • 2.Qxe5#
      • 1...e4
        • 2.Bg4#
      • 1...Qb4
        • 2.Rxd3#
      • 1...Qd4
        • 2.Re1#
      • 1...Qc4
        • 2.Re1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(c);N_GUARD::R1(A),XP(d)
    • Q(c);N_GUARD::R(A)
    • S(a);S_CUTQ(c)::R(A)
  • Tries
    • Try
      • B(E);
      • Threat
        • QAR1(G)
      • Vars
        • K(e);P-FLIGHT::QAB1(G)
        • Q(c);N_GUARD,XS(D)::QAR2(G),XP(f)
        • S(a);S_CUTQ(c)::R(A)
        • P(f);SBLOCK::QAB(G),XP(h)
      • Refutation
        • P(g);
    • Try
      • R(H);
      • Threat
        • R1(H)
      • Vars
        • P(f);P_PINQ(G)::R1(H),XP(f)
        • Q(c);N_GUARD::R1(A),XP(d)
        • Q(c);N_GUARD::R(A)
        • S(a);S_CUTQ(c)::R(A)
      • Refutation
        • P(g);
    • Try
      • Q(G);CHECK,XP(f)
      • Vars
        • K(e);P-FLIGHT,XB(E)::R1(H)
      • Refutation
        • Q(c);P_PINR(H),XQ(G)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • P(f);P_PINR(H)::QAR1(G),XP(f)
        • Q(c);N_GUARD::R1(A),XP(d)
        • Q(c);N_GUARD::R(A)
        • S(a);S_CUTQ(c)::R(A)
      • Refutation
        • P(g);
  • Actual
    • R(H);
    • Threat
      • QAB(G),XP(h)
    • Vars
      • Q(c);N_GUARD,XS(D)::QAR2(G),XP(f)
      • P(f);P_PINQ(G),SBLOCK::R(H)+B(E)
      • Q(c);N_GUARD::R1(A),XP(d)
      • Q(c);N_GUARD::R(A)
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