MESON Chess Problem Database

Problem Display
PID: 177794 (R7/b2q1p2/3pR3/1r2BQn1/2B1p3/1p4K1/1N1P4/4kN2 w - - 0 1)

Burmistrov, Sergey Gennadevich

4th HM., Sahs (Latvia), 1983

R7/b2q1p2/3pR3/1r2BQn1/2B1p3/1p4K1/1N1P4/4kN2

#2

9 + 9

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qf2#
    • 1...Rb6
      • 2.Qf2#
    • 1...Bg1
      • 2.Ra1#
    • 1...Bf2+
      • 2.Qxf2#
    • 1...Be3
      • 2.Ra1#
    • 1...Bd4
      • 2.Ra1#
    • 1...Bc5
      • 2.Ra1#
    • 1...Bb6
      • 2.Ra1#
    • 1...Bb8
      • 2.Ra1#
      • 2.Qf2#
    • 1...e3
      • 2.Qb1#
  • Tries
    • 1.Bc3?
      • threat
        • 2.d4#
      • 1...Bf2+
        • 2.Qxf2#
      • 1...Be3
        • 2.Ra1#
        • 2.dxe3#
      • 1...Bd4
        • 2.Ra1#
      • 1...Sf3!
    • 1.Bd4?
      • threat
        • 2.Qf2#
      • 1...Bxd4
        • 2.Ra1#
      • 1...Sf3
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Sh3
        • 2.Rxe4#
        • 2.Qxe4#
      • 1...Rxf5!
    • 1.Rxa7?
      • threat
        • 2.Ra1#
        • 2.Qf2#
      • 1...Ra5
        • 2.Qf2#
      • 1...Sf3
        • 2.Ra1#
        • 2.Qxe4#
      • 1...Sh3
        • 2.Ra1#
        • 2.Qxe4#
      • 1...e3
        • 2.Ra1#
        • 2.Qb1#
      • 1...Qxa7!
    • 1.Qxe4+?
      • 1...Be3
        • 2.Ra1#
        • 2.Qb1#
        • 2.Qxe3#
      • 1...Sxe4+!
  • Keys
    • 1.d4!
      • threat
        • 2.Qf2#
      • 1...Bxd4
        • 2.Ra1#
      • 1...exd4 ep
        • 2.Bc3#
      • 1...Sf3
        • 2.Qxe4#
      • 1...Sh3
        • 2.Qxe4#
      • 1...e3
        • 2.Qb1#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • R(d);S_CUTB(g)::QAB1(G)
    • B(g);OGATE::R(I)
    • B(g);CHECK,N_GUARD::QAB1(G),XB(g)
    • P(c);OGATE::QAR(G)
  • Tries
    • Try
      • B(F);P_PINP(c)
      • Threat
        • B(F)+P(C)
      • Vars
        • B(g);CHECK,N_GUARD::QAB1(G),XB(g)
        • B(g);OGATE::R(I)
      • Refutation
        • S(e);
    • Try
      • B(F);P_PINP(c)
      • Threat
        • QAB1(G)
      • Vars
        • B(g);OGATE,XB(F)::R(I)
      • Refutation
        • R(d);XQ(G)
    • Try
      • R(I);XB(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::QAB1(G)
      • Refutation
        • Q(h);XR(I)
    • Try
      • Q(G);CHECK,XP(c)
      • Refutation
        • S(e);CHECK,XQ(G)
  • Actual
    • P(C);
    • Threat
      • QAB1(G)
    • Vars
      • B(g);OGATE,XP(C)::R(I)
      • P(c);EP,OGATE,XP(C)::R(H)+B(F),DCHECK
      • S(e);N_GUARD::QAR(G),XP(c)
      • P(c);OGATE::QAR(G)
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