MESON Chess Problem Database

Problem Display
PID: 141269 (2b3K1/N1Pkp3/3PRp2/8/8/8/4Q3/8 w - - 0 1)

Anderson, Martin (England)

Source?, 0000

2b3K1/N1Pkp3/3PRp2/8/8/8/4Q3/8

#2

6 + 4

14867 BCPS Library 2011

SOLUTION

  • SOUND
  • Sets
    • 1...Ke8
      • 2.Rxe7#
    • 1...exd6
      • 2.Re7#
  • Tries
    • 1.Qd1?
      • threat
        • 2.Rxe7#
      • 1...Ke8
        • 2.Rxe7#
      • 1...exd6
        • 2.Qxd6#
      • 1...Kxe6!
    • 1.Qd3?
      • threat
        • 2.Rxe7#
      • 1...Ke8
        • 2.Rxe7#
      • 1...exd6
        • 2.Qxd6#
      • 1...Kxe6!
    • 1.Qd2?
      • threat
        • 2.Rxe7#
      • 1...Ke8
        • 2.Rxe7#
      • 1...exd6
        • 2.Qxd6#
      • 1...Kxe6!
    • 1.Qh2?
      • threat
        • 2.Rxe7#
      • 1...Ke8
        • 2.Rxe7#
      • 1...exd6
        • 2.Qxd6#
      • 1...Kxe6!
    • 1.Qe5?
      • threat
        • 2.Rxe7#
      • 1...Ke8
        • 2.Rxe7#
      • 1...exd6
        • 2.Re7#
        • 2.Qxd6#
      • 1...fxe5!
  • Keys
    • 1.Rxf6!
      • threat
        • 2.Qb5#
        • 2.Qxe7#
      • 1...Ke8
        • 2.Qxe7#
      • 1...exd6
        • 2.Rf7#
      • 1...exf6
        • 2.Qe7#
      • 1...e6
        • 2.Qxe6#
      • 1...Ba6
        • 2.Qxe7#
      • 1...Bb7
        • 2.Qxe7#
      • 1...e5
        • 2.Qb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
    • K(b);P_SPINP(c),S_FLIGHT::R1(C),XP(c)
    • P(c);SBLOCK,XP(B)::R1(C)
  • Tries
    • Try
      • Q(A);
      • Threat
        • R1(C),XP(c)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::R1(C),XP(c)
        • P(c);OGATE,P_SPINP(c),XP(B)::QAR1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • R1(C),XP(c)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::R1(C),XP(c)
        • P(c);OGATE,P_SPINP(c),XP(B)::QAR1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • R1(C),XP(c)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::R1(C),XP(c)
        • P(c);OGATE,P_SPINP(c),XP(B)::QAR1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • R1(C),XP(c)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::R1(C),XP(c)
        • P(c);OGATE,XP(B)::QAR1(A),XP(c)
      • Refutation
        • K(b);S_FLIGHT,XR(C)
    • Try
      • Q(A);
      • Threat
        • R1(C),XP(c)
      • Vars
        • K(b);P_SPINP(c),S_FLIGHT::R1(C),XP(c)
      • Refutation
        • P(a);XQ(A)
  • Actual
    • R(C);XP(a)
    • Threat
      • DUALS(2)
    • Vars
      • K(b);P_SPINP(c),S_FLIGHT::QAR1(A),XP(c)
      • P(c);OGATEB,SBLOCK,XP(B)::R(C)
      • P(c);XR(C)::QAR1(A)
      • P(c);::QAB1(A),XP(c)
      • B(d);::QAR1(A),XP(c)
      • P(c);::QAB(A)
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