MESON Chess Problem Database

Problem Display
PID: 135511 (5RN1/3rpRK1/2q1b1Qp/N1Pk4/1P6/2PP3p/5nrB/7B w - - 0 1)

Ancin, Andrej

5th Prize, Munkassakk, 1937

5RN1/3rpRK1/2q1b1Qp/N1Pk4/1P6/2PP3p/5nrB/7B

#2

12 + 9

14649 Andrej Ancin - Chess Compositions 2008

SOLUTION

  • SOUND
  • Sets
    • 1...Rd6
      • 2.Sxe7#
    • 1...Rd8
      • 2.Sxe7#
    • 1...Bg4
      • 2.Qxc6#
    • 1...Se4
      • 2.dxe4#
    • 1...Sg4
      • 2.Qe4#
  • Tries
    • 1.Bxg2+?
      • 1...Se4
        • 2.Bxe4#
        • 2.Qxe4#
        • 2.dxe4#
      • 1...hxg2!
    • 1.Qxg2+?
      • 1...Se4
        • 2.Qxe4#
        • 2.Qa2#
        • 2.dxe4#
      • 1...hxg2!
  • Keys
    • 1.Rxe7!
      • threat
        • 2.Sf6#
      • 1...Rxe7+
        • 2.Sxe7#
      • 1...Bxg8
        • 2.Rf5#
      • 1...Bg4
        • 2.Qxc6#
      • 1...Bf5
        • 2.Rxf5#
      • 1...Bf7
        • 2.Re5#
      • 1...Se4
        • 2.dxe4#
      • 1...Sg4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • R(h);N_GUARD::S(L),XP(i)
    • B(f);N_PINQ(H)::QAB1(H),XQ(e)
    • S(a);N_SPINR(b),OGATE::P(D),XS(a)
    • S(a);N_PINQ(H)::QAB1(H)
  • Tries
    • Try
      • B(A);CHECK,N_SPINQ(H),XR(b)
      • Refutation
        • P(c);XB(A)
    • Try
      • Q(H);CHECK,N_SPINQ(H),XR(b)
      • Refutation
        • P(c);P_SPINP(c),XQ(H)
  • Actual
    • R(I);P_SPINR(I),XP(i)
    • Threat
      • S(L)
    • Vars
      • R(h);CHECK,XR(I)::S(L),XR(h)
      • B(f);N_GUARD,XS(L)::R(K)
      • B(f);N_PINQ(H)::QAB1(H),XQ(e)
      • B(f);N_GUARD::R(K),XB(f)
      • B(f);N_PINR(I)::R1(I)
      • S(a);N_SPINR(b),OGATE::P(D),XS(a)
      • S(a);N_PINQ(H)::QAB1(H)
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