MESON Chess Problem Database

Problem Display
PID: 69856 (4q3/nB2b3/4N3/pN1R4/2k1p3/r1P5/p1Q5/K7 w - - 0 1)

Hassan, Molham

The Problemist Supplement, 2006

4q3/nB2b3/4N3/pN1R4/2k1p3/r1P5/p1Q5/K7

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxb5
      • 2.Rd4#
    • 1...Rb3
      • 2.Qxe4#
      • 2.Qe2#
    • 1...Rxc3
      • 2.Qxc3#
    • 1...Bh4
      • 2.Sxa3#
      • 2.Sd6#
      • 2.Rc5#
    • 1...Bc5
      • 2.Rxc5#
    • 1...Bg5
      • 2.Sxa3#
      • 2.Sd6#
      • 2.Rc5#
    • 1...Bd6
      • 2.Sxd6#
    • 1...Bf6
      • 2.Sxa3#
      • 2.Sd6#
      • 2.Rc5#
    • 1...Bd8
      • 2.Sxa3#
      • 2.Sd6#
      • 2.Rc5#
  • Tries
    • 1.Qa4+?
      • 1...Bb4
        • 2.Rd4#
      • 1...Rxa4!
    • 1.Qxa2+?
      • 1...Rb3
        • 2.Qe2#
      • 1...Rxa2+!
  • Keys
    • 1.Rd6!
      • threat
        • 2.Sxa3#
      • 1...Kxb5
        • 2.Ba6#
      • 1...Qxb5
        • 2.Rd4#
      • 1...Rxc3
        • 2.Qa4#
      • 1...Bxd6
        • 2.Sxd6#
      • 1...Sxb5
        • 2.Bd5#
      • 1...Rb3
        • 2.Qe2#
      • 1...Ra4
        • 2.Qxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • Q(h);SBLOCK,XS(D)::R1(E)
    • R(b);OGATE,P_SPINR(b),XP(C)::QAR1(B),XR(b)
    • B(g);N_GUARD::R1(E),XB(g)
    • B(g);N_GUARD::S(D),XB(g)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • B(g);P_SPINB(g)::R1(E)
      • Refutation
        • R(b);XQ(B)
    • Try
      • Q(B);CHECK,P_SPINQ(B),XP(a)
      • Vars
        • R(b);N_PINQ(B),P_SPINR(b),SBLOCK::QAB(B)
      • Refutation
        • R(b);CHECK,XQ(B)
  • Actual
    • R(E);
    • Threat
      • S(D),XR(b)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(D)::B(G)
      • Q(h);SBLOCK,XS(D)::R1(E)
      • R(b);N_GUARD,P_SPINR(b),XP(C)::QAR2(B)
      • B(g);XR(E)::S(D),XB(g)
      • S(f);SBLOCK,XS(D)::B(G)
      • R(b);SBLOCK::QAB(B)
      • R(b);N_GUARD::QAR2(B),XR(b)
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