MESON Chess Problem Database

Problem Display
PID: 39120 (b7/B5p1/1Qp2pP1/5Rpn/2K3Pq/3NpNp1/2B1kPRb/8 w - - 0 1)

Reeves, Alfred Christopher

The Problemist, 2001

b7/B5p1/1Qp2pP1/5Rpn/2K3Pq/3NpNp1/2B1kPRb/8

#2

11 + 11

5454 Near Snap 2013

SOLUTION

  • SOUND
  • Tries
    • 1.Sd4+?
      • 1...Kd2
        • 2.Qa5#
        • 2.Qb4#
      • 1...Kf1!
    • 1.Qb1?
      • threat
        • 2.Qd1#
        • 2.Qe1#
        • 2.fxe3#
        • 2.fxg3#
      • 1...exf2
        • 2.Qd1#
        • 2.Qe1#
      • 1...gxf2
        • 2.Qd1#
        • 2.Qe1#
      • 1...Sf4
        • 2.Qd1#
      • 1...Qh3
        • 2.Qd1#
        • 2.Qe1#
      • 1...Bg1
        • 2.Qd1#
        • 2.Qe1#
      • 1...c5
        • 2.Qd1#
        • 2.Qe1#
        • 2.fxg3#
      • 1...Qxg4+!
  • Keys
    • 1.Sd2!
      • threat
        • 2.Qxe3#
        • 2.fxe3#
        • 2.fxg3#
        • 2.f3#
        • 2.f4#
      • 1...Qxg4+
        • 2.f4#
      • 1...Kxd2
        • 2.fxe3#
      • 1...exd2
        • 2.fxg3#
      • 1...exf2
        • 2.Qe3#
      • 1...gxf2
        • 2.Qxe3#
      • 1...Qh3
        • 2.Qxe3#
      • 1...Bg1
        • 2.Qxe3#
      • 1...Sf4
        • 2.Qxe3#
      • 1...c5
        • 2.f3#

Anticipated by 74293(1952)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(E);CHECK,N_SPINP(G)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(I);
      • Threat
        • DUALS(4)
      • Vars
        • S(g);N_PINP(G)::QAB1(I)
      • Refutation
        • Q(e);CHECK,XP(G)
  • Actual
    • S(E);
    • Threat
      • DUALS(5)
    • Vars
      • Q(e);CHECK,XP(G)::R(C)+P(B)
      • K(a);P-FLIGHT,XS(E)::R(C)+P(B),XP(c)
      • P(c);SBLOCK,XS(E)::R(C)+P(B),XP(d)
      • P(c);P_SPINP(c),XP(B)::QAR1(I)
      • P(d);P_SPINP(d),XP(B)::QAR1(I),XP(c)
      • Q(e);N_PINP(G)::QAR1(I),XP(c)
      • B(b);::QAR1(I),XP(c)
      • S(g);N_PINP(G)::QAR1(I),XP(c)
      • P(h);::R(C)+P(B)
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