MESON Chess Problem Database

Problem Display
PID: 141494 (K7/4Q3/2RN4/p1pk4/r2n4/1pPr4/5b2/7b w - - 0 1)

den Toom, Cornelis

Probleemblad, 1976

K7/4Q3/2RN4/p1pk4/r2n4/1pPr4/5b2/7b

#2

5 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rf3
      • 2.Qe4#
    • 1...Be4
      • 2.Qxe4#
  • Tries
    • 1.Sc8?
      • threat
        • 2.Rxc5#
      • 1...Kc4
        • 2.Qxc5#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Sxc6
        • 2.Sb6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Rc4
        • 2.Rd6#
      • 1...Sc2
        • 2.Qe6#
      • 1...Se2
        • 2.Qe6#
      • 1...Sf3
        • 2.Qe6#
      • 1...Sb5
        • 2.Qe6#
      • 1...Sf5
        • 2.Qe6#
      • 1...c4
        • 2.Rc5#
      • 1...Rxc3!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Rxc5#
      • 1...Kxc4
        • 2.Qxc5#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Rxc4
        • 2.Rd6#
      • 1...Sxc6
        • 2.Sb6#
      • 1...Se6
        • 2.Qxe6#
      • 1...Sc2
        • 2.Qe6#
      • 1...Se2
        • 2.Qe6#
      • 1...Sf3
        • 2.Qe6#
      • 1...Sb5
        • 2.Qe6#
      • 1...Sf5
        • 2.Qe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 10
    • REMOVED MATES = 2
  • Sets
    • R(d);S_CUTB(a)::QAB1(D)
    • B(a);N_GUARD::QAB1(D),XB(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • R1(B),XP(h)
      • Vars
        • K(i);P_PINR(B),P_SPINP(h),S_FLIGHT::QAR1(D),XP(h)
        • K(i);OGATEB,S_FLIGHT,XR(B)::QAB1(D)
        • S(f);SBLOCK,XR(B)::S(C)
        • S(f);N_GUARD::QAB1(D),XS(f)
        • R(e);SBLOCK::R1(B)
        • S(f);N_GUARD::QAB1(D)
        • P(h);::R1(B)
      • Refutation
        • R(d);XP(A)
  • Actual
    • S(C);
    • Threat
      • R1(B),XP(h)
    • Vars
      • K(i);P_PINR(B),P_SPINP(h),S_FLIGHT,XS(C)::QAR1(D),XP(h)
      • K(i);OGATEB,S_FLIGHT,XR(B)::QAB1(D)
      • R(e);SBLOCK,XS(C)::R1(B)
      • S(f);SBLOCK,XR(B)::S(C)
      • S(f);N_GUARD::QAB1(D),XS(f)
      • S(f);N_GUARD::QAB1(D)
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