MESON Chess Problem Database

Problem Display
PID: 70735 (4BB2/1K1N1p2/1nppk2N/1QR5/7p/p2p4/4rrn1/4q2b w - - 0 1)

Overkamp, Petrus

5th HM., Pesti Hirlap, 1965

4BB2/1K1N1p2/1nppk2N/1QR5/7p/p2p4/4rrn1/4q2b

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...dxc5
      • 2.Qxc6#
    • 1...d5
      • 2.Rxc6#
      • 2.Qxc6#
  • Tries
    • 1.Re5+?
      • 1...dxe5
        • 2.Qxc6#
      • 1...Rxe5!
    • 1.Rxc6?
      • threat
        • 2.Rxd6#
      • 1...Se3
        • 2.Qe5#
      • 1...Sf4
        • 2.Qf5#
      • 1...Sc4
        • 2.Qxc4#
      • 1...Sc8
        • 2.Qc4#
        • 2.Qb3#
      • 1...Qb4!
  • Keys
    • 1.Qxc6!
      • threat
        • 2.Qxd6#
      • 1...Se3
        • 2.Re5#
      • 1...Sf4
        • 2.Bxf7#
      • 1...Sc4
        • 2.Qd5#
      • 1...Sc8
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • P(k);OGATEB,XR(B)::QAR2(A),XP(j)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • P(k);S_CUTR(c),XR(B)::QAR2(A),XP(j)
      • Refutation
        • R(c);XR(B)
    • Try
      • R(B);P_PINP(k),XP(j)
      • Threat
        • R1(B),XP(k)
      • Vars
        • S(e);P_PINR(B),S_CUTR(c)::QAR1(A)
        • S(e);P_PINR(B),S_CUTR(d)::QAB1(A)
        • S(i);N_GUARD::QAB(A),XS(i)
      • Refutation
        • Q(a);
  • Actual
    • Q(A);P_PINP(k),XP(j)
    • Threat
      • QAR1(A),XP(k)
    • Vars
      • S(e);P_PINQ(A),S_CUTR(c)::R1(B)
      • S(e);P_PINQ(A),S_CUTR(d)::B(F),XP(m)
      • S(i);N_GUARD::QAB1(A)
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