MESON Chess Problem Database

Problem Display
PID: 262461 (7B/3R4/8/8/1R1Qn3/2p1K3/r2p4/k7 w - - 0 1)

Onkoud, Abdelaziz

Europe Echecs, 1995

7B/3R4/8/8/1R1Qn3/2p1K3/r2p4/k7

#2

5 + 5

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Ra7
      • 2.Rxa7#
      • 2.Qxa7#
    • 1...d1Q
      • 2.Qxd1#
    • 1...d1S+
      • 2.Qxd1#
    • 1...d1B
      • 2.Qxd1#
    • 1...d1R
      • 2.Qxd1#
  • Tries
    • 1.Qxc3+?
      • 1...Rb2
        • 2.Qxb2#
      • 1...Sxc3!
    • 1.Qa7?
      • 1...d1S+
        • 2.Rxd1#
      • 1...Rxa7
        • 2.Rxa7#
      • 1...Ra3
        • 2.Qxa3#
      • 1...Ra4
        • 2.Qxa4#
      • 1...Ra5
        • 2.Qxa5#
      • 1...Ra6
        • 2.Qxa6#
      • 1...d1Q
        • 2.Rxd1#
      • 1...d1B
        • 2.Rxd1#
      • 1...d1R
        • 2.Rxd1#
      • 1...Sf2
        • 2.Bxc3#
      • 1...Sg3
        • 2.Bxc3#
      • 1...Sc5
        • 2.Bxc3#
      • 1...Sg5
        • 2.Bxc3#
      • 1...Sd6
        • 2.Bxc3#
      • 1...Sf6!
  • Keys
    • 1.Ra7!
      • 1...d1S+
        • 2.Qxd1#
      • 1...Rxa7
        • 2.Qxa7#
      • 1...Ra3
        • 2.Rxa3#
      • 1...Ra4
        • 2.Raxa4#
      • 1...Ra5
        • 2.Rxa5#
      • 1...Ra6
        • 2.Rxa6#
      • 1...d1Q
        • 2.Qxd1#
      • 1...d1B
        • 2.Qxd1#
      • 1...d1R
        • 2.Qxd1#
      • 1...Sf2
        • 2.Qxc3#
      • 1...Sg3
        • 2.Qxc3#
      • 1...Sc5
        • 2.Qxc3#
      • 1...Sg5
        • 2.Qxc3#
      • 1...Sd6
        • 2.Qxc3#
      • 1...Sf6
        • 2.Qxc3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 0
  • Sets
    • P(c);OGATE::QAR(C),XQ(c)
    • P(c);CHECK,OGATE::QAR(C),XS(c)
    • P(c);OGATE::QAR(C),XB(c)
    • P(c);OGATE::QAR(C),XR(c)
  • Tries
    • Try
      • Q(C);CHECK,XP(d)
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::QAB1(C),XR(b)
      • Refutation
        • S(e);P_SPINS(e),XQ(C)
    • Try
      • Q(C);P_PINR(b)
      • Vars
        • P(c);CHECK,OGATE::R(D),XS(c)
        • R(b);N_SPINR(b),OGATE,XQ(C)::R(D),XR(b)
        • R(b);OGATEB::QAR2(C),XR(b)
        • R(b);OGATEB::QAR(C),XR(b)
        • P(c);OGATE::R(D),XQ(c)
        • P(c);OGATE::R(D),XB(c)
        • P(c);OGATE::R(D),XR(c)
        • S(e);N_GUARD::B(E),XP(d)
      • Refutation
        • S(e);N_SPINP(d)
  • Actual
    • R(D);P_PINR(b)
    • Vars
      • P(c);CHECK,OGATE::QAR(C),XS(c)
      • R(b);N_SPINR(b),OGATE,XR(D)::QAR(C),XR(b)
      • R(b);OGATEB::R(D),XR(b)
      • P(c);OGATE::QAR(C),XQ(c)
      • P(c);OGATE::QAR(C),XB(c)
      • P(c);OGATE::QAR(C),XR(c)
      • S(e);N_GUARD::QAB(C),XP(d)
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