MESON Chess Problem Database

Problem Display
PID: 87642 (4Q3/3p4/3P1p2/6p1/Bp1B2p1/3r1kP1/1q2p1NP/2r1R2K w - - 0 1)

May, Willy Paul

American Chess Problemist, 1950

4Q3/3p4/3P1p2/6p1/Bp1B2p1/3r1kP1/1q2p1NP/2r1R2K

#2

9 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qxe2#
    • 1...Qa3
      • 2.Qxe2#
    • 1...Qc3
      • 2.Qxe2#
    • 1...Qxd4
      • 2.Qxe2#
    • 1...Qb1
      • 2.Qxe2#
    • 1...Qb3
      • 2.Qxe2#
    • 1...Ra1
      • 2.Qa8#
    • 1...Rb1
      • 2.Qa8#
    • 1...Rcd1
      • 2.Qa8#
    • 1...Rxe1+
      • 2.Sxe1#
    • 1...Rdd1
      • 2.Qe3#
    • 1...Rd2
      • 2.Qe3#
    • 1...Re3
      • 2.Qxe3#
    • 1...Rxd4
      • 2.Qe3#
  • Keys
    • 1.Bd1!
      • threat
        • 2.Rf1#
      • 1...Qxd4
        • 2.Qxe2#
      • 1...Rcxd1
        • 2.Qa8#
      • 1...Rdxd1
        • 2.Qe3#
      • 1...exd1Q
        • 2.Qe4#
      • 1...exd1S
        • 2.Qe4#
      • 1...exd1B
        • 2.Qe4#
      • 1...exd1R
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 11
  • Sets
    • Q(b);N_GUARD::QAB1(I),XP(c)
    • Q(b);N_GUARD,XB(G)::QAB1(I),XP(c)
    • R(a);N_GUARD::QAB(I)
    • R(a);CHECK,XR(A)::S(C),XR(a)
    • R(d);N_GUARD::QAR1(I)
    • R(d);N_GUARD::QAR1(I),XR(d)
    • R(d);N_GUARD,XB(G)::QAR1(I)
  • Actual
    • B(F);N_SPINR(A),P_PINP(c)
    • Threat
      • R(A)
    • Vars
      • Q(b);N_GUARD,XB(G)::QAB1(I),XP(c)
      • R(a);N_GUARD,N_SPINP(c),P_PINR(A),XB(F)::QAB(I)
      • R(d);N_GUARD,N_SPINP(c),P_PINR(A),XB(F)::QAR1(I)
      • P(c);N_SPINP(c),P_PINR(A),XB(F)::QAB1(I)
      • P(c);N_SPINP(c),XB(F)::QAB1(I)
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Developed and maintained by Brian Stephenson.
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