MESON Chess Problem Database

Problem Display
PID: 139518 (8/1p3N2/1B2r3/Kp1k4/2N5/Q1p4R/B2P4/8 w - - 0 1)

Orlov, Y

2nd Prize, Shakhmatnaya Poeziya, 1999

8/1p3N2/1B2r3/Kp1k4/2N5/Q1p4R/B2P4/8

#2

8 + 5

56 The Problemist 2010
5454 Near Snap 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Re4
      • 2.Qd6#
  • Tries
    • 1.Rd3+?
      • 1...Kc6
        • 2.Sd8#
        • 2.Qc5#
      • 1...Ke4!
    • 1.Qxc3?
      • threat
        • 2.Scd6#
      • 1...Ke4
        • 2.Qf3#
      • 1...Kc6
        • 2.Sce5#
      • 1...bxc4
        • 2.Qxc4#
      • 1...Rd6
        • 2.Scxd6#
      • 1...Re4
        • 2.Se3#
      • 1...Rc6
        • 2.Qe5#
      • 1...b4!
  • Keys
    • 1.Qb4!
      • threat
        • 2.Sce5#
      • 1...Ke4
        • 2.Scd6#
      • 1...Kc6
        • 2.Qxb5#
      • 1...bxc4
        • 2.Qxc4#
      • 1...Re5
        • 2.Scxe5#
      • 1...Re4
        • 2.Qd6#
      • 1...Rc6
        • 2.Se3#

This anticipates 45070(2000)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • R(d);N_GUARD,SBLOCK::QAR1(C)
  • Tries
    • Try
      • R(D);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(C);XP(a)
      • Threat
        • B(A)+S(E)
      • Vars
        • K(c);S_FLIGHT::QAB1(C)
        • K(c);S_FLIGHT::QAR(C)+S(E),DCHECK
        • P(b);OGATE,P_SPINP(b),XS(E)::QAB1(C),XP(b)
        • R(d);::B(A)+S(E),XR(d)
        • R(d);SBLOCK::B(A)+S(E),DCHECK
        • R(d);N_GUARD,SBLOCK::QAR1(C)
      • Refutation
        • P(b);
  • Actual
    • Q(C);
    • Threat
      • B(A)+S(E)
    • Vars
      • K(c);S_FLIGHT::QAR(C)+S(E),DCHECK
      • K(c);S_FLIGHT::QAB1(C),XP(b)
      • P(b);OGATE,P_SPINP(b),XS(E)::QAB1(C),XP(b)
      • R(d);::B(A)+S(E),XR(d)
      • R(d);N_GUARD,SBLOCK::QAR1(C)
      • R(d);SBLOCK::B(A)+S(E),DCHECK
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