MESON Chess Problem Database

Problem Display
PID: 109384 (3kr1N1/2p1p3/nB2B3/6Q1/1n2p3/2R5/8/7K w - - 0 1)

Sim, Malcolm

Toronto Telegram, 1953

3kr1N1/2p1p3/nB2B3/6Q1/1n2p3/2R5/8/7K

#2

6 + 7

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rf8
      • 2.Qxe7#
    • 1...Rxg8
      • 2.Qxg8#
    • 1...Sa2
      • 2.Qd2#
      • 2.Qd5#
    • 1...Sc2
      • 2.Qd5#
    • 1...Sd3
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sc6
      • 2.Qd5#
    • 1...Sb8
      • 2.Bxc7#
    • 1...cxb6
      • 2.Rc8#
  • Tries
    • 1.Rd3+?
      • 1...Sxd3
        • 2.Qd5#
      • 1...Sd5
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...exd3!
    • 1.Qd2+?
      • 1...Sd5
        • 2.Qxd5#
      • 1...Sd3!
    • 1.Qb5?
      • threat
        • 2.Qd7#
      • 1...Sc6
        • 2.Qd5#
      • 1...Sb8
        • 2.Bxc7#
      • 1...Sc5!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Rd6#
      • 1...Rxg8
        • 2.Qxg8#
      • 1...Sxc6
        • 2.Qd5#
      • 1...cxb6
        • 2.Rc8#
      • 1...Rf8
        • 2.Qxe7#
      • 1...Sc5
        • 2.Bxc7#
      • 1...Sb8
        • 2.Bxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(g);N_GUARD::QAB1(C),XP(e)
    • R(g);OGATE,XS(F)::QAR(C),XR(g)
    • S(a);N_GUARD::QAR(C)
    • S(a);N_GUARD::QAR(C),XS(a)
    • S(c);N_GUARD::B(D),XP(d)
    • P(d);N_SPINP(d),OGATE,P_SPINP(e),XB(D)::R1(B)
  • Tries
    • Try
      • R(B);CHECK
      • Vars
        • S(a);N_GUARD,XR(B)::QAR(C)
      • Refutation
        • P(b);XR(B)
    • Try
      • Q(C);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR(C),XS(a)
      • Refutation
        • S(a);P_SPINS(a)
    • Try
      • Q(C);
      • Threat
        • QAR1(C)
      • Vars
        • S(a);N_GUARD::QAR(C)
        • S(c);N_GUARD::B(D),XP(d)
      • Refutation
        • S(c);
  • Actual
    • R(B);
    • Threat
      • R(B)
    • Vars
      • R(g);OGATE,XS(F)::QAR(C),XR(g)
      • S(a);N_GUARD,XR(B)::QAR(C)
      • P(d);N_SPINP(d),OGATE,P_SPINP(e),XB(D)::R1(B)
      • R(g);N_GUARD::QAB1(C),XP(e)
      • S(c);N_GUARD::B(D),XP(d)
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