MESON Chess Problem Database

Problem Display
PID: 169259 (6n1/3N1p2/1pR5/5k1K/2N1pp2/1b1PP3/Q3P3/8 w - - 0 1)

Gorbatenko, Yuri Grigorevich

1st HM., SuperProblem 191. TT, 2017

6n1/3N1p2/1pR5/5k1K/2N1pp2/1b1PP3/Q3P3/8

#2

8 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Bd1
      • 2.Sd6#
    • 1...Bc2
      • 2.Sd6#
    • 1...Ba4
      • 2.Sd6#
    • 1...Sf6+
      • 2.Rxf6#
    • 1...Sh6
      • 2.Rf6#
    • 1...Se7
      • 2.Rf6#
  • Tries
    • 1.Sd2?
      • threat
        • 2.dxe4#
      • 1...Sf6+
        • 2.Rxf6#
      • 1...exd3
        • 2.e4#
      • 1...Bc2
        • 2.Qd5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...fxe3!
    • 1.Qxb3?
      • threat
        • 2.Sd6#
        • 2.Qb5#
      • 1...Sf6+
        • 2.Rxf6#
      • 1...exd3
        • 2.Sd6#
        • 2.Qxd3#
      • 1...Se7
        • 2.Sd6#
        • 2.Rf6#
      • 1...b5
        • 2.Sd6#
        • 2.Qxb5#
      • 1...fxe3!
    • 1.Qa1?
      • threat
        • 2.Qe5#
      • 1...Sf6+
        • 2.Rxf6#
        • 2.Qxf6#
      • 1...f6!
    • 1.Qb2?
      • threat
        • 2.Qe5#
      • 1...Sf6+
        • 2.Rxf6#
        • 2.Qxf6#
      • 1...f6!
    • 1.Qa5+?
      • 1...b5
        • 2.Qxb5#
      • 1...bxa5!
  • Keys
    • 1.Qb1!
      • threat
        • 2.dxe4#
      • 1...Sf6+
        • 2.Rxf6#
      • 1...exd3
        • 2.Qxd3#
      • 1...fxe3
        • 2.Qf1#
      • 1...Bc2
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(a);P_PINP(B)::S(E)
    • B(a);::S(E)
    • S(g);CHECK,N_GUARD::R1(G),XS(g)
    • S(g);N_GUARD::R1(G)
  • Tries
    • Try
      • S(E);
      • Threat
        • P(C),XP(b)
      • Vars
        • S(g);CHECK,N_GUARD::R1(G),XS(g)
        • P(b);OGATE,XP(C)::P(D)
        • B(a);OGATE::QAR2(A)
        • B(a);OGATE::QAR2(A),XB(a)
      • Refutation
        • P(c);XP(D)
    • Try
      • Q(A);XB(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(g);CHECK,N_GUARD::R1(G),XS(g)
      • Refutation
        • P(c);XP(D)
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • P(f);
    • Try
      • Q(A);
      • Threat
        • QAR1(A)
      • Refutation
        • P(f);
    • Try
      • Q(A);CHECK
      • Vars
        • P(e);P_SPINP(e)::QAR(A),XP(e)
      • Refutation
        • P(e);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • P(C),XP(b)
    • Vars
      • S(g);CHECK,N_GUARD::R1(G),XS(g)
      • P(b);OGATE,P_SPINP(b),XP(C)::QAB(A),XP(b)
      • P(c);OGATEB,XP(D)::QAR(A)
      • B(a);OGATE::QAR(A)
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