MESON Chess Problem Database

Problem Display
PID: 88851 (2N5/2br4/4pkBP/1pB1p1NP/2r1R2K/p2pP1Pp/Qq6/8 w - - 0 1)

May, Willy Paul

American Chess Problemist, 1950

2N5/2br4/4pkBP/1pB1p1NP/2r1R2K/p2pP1Pp/Qq6/8

#2

11 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qf2#
    • 1...Qc1
      • 2.Qf2#
    • 1...Qc3
      • 2.Qf2#
    • 1...Qd4
      • 2.Qf2#
    • 1...Qb1
      • 2.Qf2#
    • 1...Qf2
      • 2.Qxf2#
    • 1...Qb3
      • 2.Qf2#
    • 1...Qb4
      • 2.Qf2#
    • 1...Rc1
      • 2.Qxe6#
    • 1...Rc2
      • 2.Qxe6#
    • 1...Rc3
      • 2.Qxe6#
    • 1...Ra4
      • 2.Qxe6#
    • 1...Rb4
      • 2.Qxe6#
    • 1...Rcd4
      • 2.Qxe6#
    • 1...Rxe4+
      • 2.Sxe4#
    • 1...Rxc5
      • 2.Qxe6#
    • 1...Rdd4
      • 2.Sh7#
      • 2.Be7#
    • 1...Rd5
      • 2.Sh7#
      • 2.Be7#
    • 1...Rd6
      • 2.Sh7#
    • 1...Re7
      • 2.Bxe7#
    • 1...Rh7
      • 2.Sxh7#
    • 1...Rd8
      • 2.Sh7#
      • 2.Be7#
  • Tries
    • 1.Se7?
      • threat
        • 2.Sh7#
        • 2.Sg8#
      • 1...Rxe4+
        • 2.Sxe4#
      • 1...Rxc5
        • 2.Sg8#
        • 2.Qxe6#
      • 1...Rd6
        • 2.Sg8#
      • 1...Bd6
        • 2.Sg8#
      • 1...Rd8
        • 2.Sh7#
      • 1...Rxe7!
  • Keys
    • 1.Bd4!
      • threat
        • 2.Rf4#
      • 1...Qxd4
        • 2.Qf2#
      • 1...Rcxd4
        • 2.Qxe6#
      • 1...Rdxd4
        • 2.Sh7#
      • 1...exd4
        • 2.Rxe6#
      • 1...Qf2
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 16
  • Sets
    • Q(a);OGATE::QAR(A)
    • Q(a);OGATE,P_PINP(C)::QAR(A),XQ(a)
    • R(e);N_PINR(D),OGATE::QAR1(A),XP(h)
    • R(e);OGATE::QAR1(A),XP(h)
    • R(e);CHECK,XR(D)::S(G),XR(e)
    • R(e);N_PINR(D),OGATE,XB(F)::QAR1(A),XP(h)
    • R(k);N_GUARD::S(G)
    • R(k);N_GUARD::B(F),XR(k)
    • R(k);N_GUARD::S(G),XR(k)
  • Tries
    • Try
      • S(K);
      • Threat
        • DUALS(2)
      • Vars
        • R(e);CHECK,XR(D)::S(G),XR(e)
        • R(k);::S(K)
        • B(j);::S(K)
        • R(k);::S(G)
      • Refutation
        • R(k);XS(K)
  • Actual
    • B(F);N_SPINR(D),P_PINP(g)
    • Threat
      • R(D)
    • Vars
      • Q(a);N_SPINP(g),OGATE,P_PINR(D),XB(F)::QAR(A)
      • R(e);N_SPINP(g),OGATE,P_PINR(D),XB(F)::QAR1(A),XP(h)
      • R(k);N_GUARD,N_SPINP(g),P_PINR(D),XB(F)::S(G)
      • P(g);N_SPINP(g),OGATE,XB(F)::R1(D),XP(h)
      • Q(a);OGATE,P_PINP(C)::QAR(A),XQ(a)
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