MESON Chess Problem Database

Problem Display
PID: 248418 (b3R3/4N1K1/8/1p1B1p2/1P1k1Bp1/4p1p1/1nPP3Q/4r1N1 w - - 0 1)

Mochalkin, Oleksandr Viktorovich

4th HM., Novi Sad Olympic Ty., 1990

b3R3/4N1K1/8/1p1B1p2/1P1k1Bp1/4p1p1/1nPP3Q/4r1N1

#2

10 + 9

14867 BCPS Library 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Se2#
    • 1...Rb1
      • 2.Se2#
    • 1...Rc1
      • 2.Se2#
    • 1...Rd1
      • 2.Se2#
    • 1...Rf1
      • 2.Se2#
    • 1...Re2
      • 2.Sxe2#
    • 1...Sd3
      • 2.c3#
    • 1...g2
      • 2.Be5#
  • Tries
    • 1.Qg2?
      • threat
        • 2.Sxf5#
      • 1...Bxd5
        • 2.Qxd5#
      • 1...exd2!
  • Keys
    • 1.Qe2!
      • threat
        • 2.c3#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...Bxd5
        • 2.Sxf5#
      • 1...exd2
        • 2.Be5#
      • 1...Rc1
        • 2.Qxe3#
      • 1...Sd1
        • 2.Qd3#
      • 1...Sa4
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 6
  • Sets
    • R(a);N_GUARD::S(A)
    • R(a);N_GUARD::S(A),XR(a)
    • S(b);SBLOCK::P(B)
    • P(d);::B(F)
  • Tries
    • Try
      • Q(D);
      • Threat
        • S(H),XP(h)
      • Vars
        • B(i);OGATE,XB(G)::QAR1(D),XB(i)
      • Refutation
        • P(c);XP(C)
  • Actual
    • Q(D);
    • Threat
      • P(B)
    • Vars
      • R(a);XQ(D)::S(A),XR(a)
      • B(i);SBLOCK,XB(G)::S(H),XP(h)
      • P(c);XP(C)::B(F)
      • R(a);N_GUARD::QAB1(D),XP(c)
      • S(b);N_GUARD::QAR1(D)
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