MESON Chess Problem Database

Problem Display
PID: 70813 (1R1Qn3/2q5/7p/k6r/7p/1PR5/2K5/5B2 w - - 0 1)

Servais, Albert

1st Prize, ABP, 1943

1R1Qn3/2q5/7p/k6r/7p/1PR5/2K5/5B2

#2

6 + 6

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Qb6
      • 2.Qxb6#
    • 1...Rc5
      • 2.Rxc5#
    • 1...Sd6
      • 2.Qxc7#
    • 1...Sf6
      • 2.Qxc7#
    • 1...Sg7
      • 2.Qxc7#
  • Tries
    • 1.Rxc7?
      • threat
        • 2.Rc5#
        • 2.Ra7#
        • 2.Qd2#
      • 1...Rc5+
        • 2.Rxc5#
      • 1...Sxc7
        • 2.Qxc7#
        • 2.Qd2#
      • 1...Rd5
        • 2.Rc5#
        • 2.Ra7#
        • 2.Qxd5#
      • 1...Sd6
        • 2.Rc3#
        • 2.Rc5#
        • 2.Rc6#
        • 2.Ra7#
        • 2.Rcb7#
        • 2.Rd7#
        • 2.Re7#
        • 2.Rf7#
        • 2.Rg7#
        • 2.Rh7#
        • 2.Rcc8#
      • 1...Rb5!
    • 1.Ra8+?
      • 1...Kb4
        • 2.Ra4#
      • 1...Kb6!
    • 1.Qd5+?
      • 1...Qc5
        • 2.Rxc5#
      • 1...Rxd5!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Qd2#
      • 1...Rc5+
        • 2.Rxc5#
      • 1...Qxd8
        • 2.Ra6#
      • 1...Qb6
        • 2.Qxb6#
      • 1...Rb5
        • 2.Rxb5#
      • 1...Rd5
        • 2.Qxd5#
      • 1...Sd6
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(e);N_PINR(D),OGATE::QAB1(F),XQ(e)
    • R(c);N_GUARD::R(D),XR(c)
    • S(f);N_GUARD::QAB(F),XQ(e)
  • Tries
    • Try
      • R(D);N_SPINR(D),XQ(e)
      • Threat
        • DUALS(3)
      • Vars
        • R(c);CHECK::QAB(F)+R(D),DCHECK,XR(c)
      • Refutation
        • R(c);
    • Try
      • R(E);CHECK
      • Vars
        • K(b);N_SPINQ(e),OGATE,S_FLIGHT::R1(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(F);CHECK,N_PINQ(e)
      • Vars
        • Q(e);N_GUARD,P_SPINQ(e)::R(D),XQ(e)
      • Refutation
        • R(c);XQ(F)
  • Actual
    • R(D);
    • Threat
      • QAB(F)
    • Vars
      • R(c);CHECK,N_GUARD,N_PINR(D)::R(D),XR(c)
      • Q(e);N_PINR(D),N_SPINQ(e),XQ(F)::R1(D)
      • Q(e);N_PINR(D),OGATE::QAB1(F),XQ(e)
      • R(c);N_GUARD::R1(E),XR(c)
      • R(c);N_GUARD::QAR(F),XR(c)
      • S(f);N_GUARD::QAB(F),XQ(e)
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