MESON Chess Problem Database

Problem Display
PID: 135506 (5q2/3nbpRb/5Nr1/4pB2/6p1/R1N4k/3K1Bp1/6Q1 w - - 0 1)

Ancin, Andrej

Munkassakk, 1936

5q2/3nbpRb/5Nr1/4pB2/6p1/R1N4k/3K1Bp1/6Q1

#2

8 + 10

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rxf6
      • 2.Bxg4#
    • 1...Rh6
      • 2.Bxg4#
  • Tries
    • 1.Be4?
      • threat
        • 2.Bxg2#
        • 2.Qxg2#
      • 1...Qa8
        • 2.Qxg2#
      • 1...g3!
    • 1.Rxg6?
      • threat
        • 2.Bxg4#
      • 1...Qh6+
        • 2.Rxh6#
      • 1...Sxf6!
    • 1.Rxh7+?
      • 1...Rh6
        • 2.Bxg4#
      • 1...Qh6+!
  • Keys
    • 1.Sxg4!
      • threat
        • 2.Qh2#
      • 1...Rd6+
        • 2.Sd5#
      • 1...Bg5+
        • 2.Se3#
      • 1...Rxg4
        • 2.Bxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(e);N_GUARD,XS(G)::B(F),XP(c)
    • R(e);N_GUARD::B(F),XP(c)
  • Tries
    • Try
      • B(F);N_PINP(c)
      • Threat
        • DUALS(2)
      • Vars
        • Q(j);::QAB1(A),XP(a)
      • Refutation
        • P(c);
    • Try
      • R(H);XR(e)
      • Threat
        • B(F),XP(c)
      • Vars
        • Q(j);CHECK,N_GUARD::R(H),XQ(j)
      • Refutation
        • S(f);XS(G)
    • Try
      • R(H);CHECK,XB(i)
      • Vars
        • R(e);P_SPINR(e)::B(F),XP(c)
      • Refutation
        • Q(j);CHECK,P_SPINQ(j)
  • Actual
    • S(G);XP(c)
    • Threat
      • QAR1(A)
    • Vars
      • R(e);CHECK,S_CUTB(g)::R(D)+S(E)
      • B(g);CHECK,S_CUTR(e)::B(F)+S(G)
      • R(e);OGATE,P_SPINR(e),XS(G)::B(F),XR(e)
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