MESON Chess Problem Database

Problem Display
PID: 231652 (1B6/1Br1pR2/3r2Pp/1b1NkP2/4pN2/Q1Pp2K1/8/4R3 w - - 0 1)

Opdenoordt, Joseph J

1st HM., Magyar Sakkvilag, 1927

1B6/1Br1pR2/3r2Pp/1b1NkP2/4pN2/Q1Pp2K1/8/4R3

#2

11 + 8

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd5
      • 2.Qxe7#
    • 1...Rxg6+
      • 2.Sxg6#
    • 1...Rd8
      • 2.Qxe7#
    • 1...Rxc3
      • 2.Qxc3#
    • 1...Rc4
      • 2.Sxd3#
    • 1...Ba4
      • 2.Sxd3#
    • 1...Bd7
      • 2.Sxd3#
    • 1...Be8
      • 2.Sxd3#
    • 1...e3
      • 2.Rxe3#
  • Tries
    • 1.Se3?
      • threat
        • 2.Sg4#
      • 1...Rxg6+
        • 2.Sxg6#
      • 1...Rxc3
        • 2.Qxc3#
      • 1...Rf6
        • 2.Qc5#
      • 1...h5!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Rxe4#
      • 1...Rxg6+
        • 2.Sxg6#
      • 1...Rxb7
        • 2.Qc5#
      • 1...Rf6
        • 2.Qc5#
      • 1...Rd4
        • 2.Qxe7#
      • 1...Rd5
        • 2.Qxe7#
      • 1...Rdc6
        • 2.Sd7#
      • 1...Rc4
        • 2.Sxd3#
      • 1...Rcc6
        • 2.Sd7#
      • 1...Bc6
        • 2.Sc4#
      • 1...e3
        • 2.Rxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • R(e);OGATE,P_SPINR(g),XS(F)::QAR2(B),XP(h)
    • R(e);CHECK,P_SPINR(g),XP(H)::S(E),XR(e)
    • R(e);OGATE,P_SPINR(g)::QAR2(B),XP(h)
    • R(g);OGATE,P_SPINR(e),XP(C)::QAB(B),XR(g)
    • R(g);P_SPINR(e),S_CUTB(c)::S(E),XP(a)
    • B(c);N_GUARD::S(E),XP(a)
    • P(b);OGATEB::R(A),XP(b)
  • Tries
    • Try
      • S(F);N_PINP(b)
      • Threat
        • S(F)
      • Vars
        • R(e);CHECK,P_SPINR(g),XP(H)::S(E),XR(e)
        • R(g);OGATE,P_SPINR(e),XP(C)::QAB(B),XR(g)
        • R(e);N_GUARD,P_SPINR(g)::QAR2(B)
      • Refutation
        • P(f);
  • Actual
    • S(F);
    • Threat
      • R1(A),XP(b)
    • Vars
      • R(e);CHECK,P_SPINR(g),XP(H)::S(E),XR(e)
      • R(g);N_GUARD,P_SPINR(e),XB(I)::QAR2(B)
      • R(e);N_GUARD,P_SPINR(g)::QAR2(B)
      • R(e);OGATE,P_SPINR(g)::QAR2(B),XP(h)
      • R(e);N_GUARD,P_SPINR(g),S_CUTB(c)::S(F)
      • R(g);P_SPINR(e),S_CUTB(c)::S(E),XP(a)
      • R(g);N_GUARD,P_SPINR(e),S_CUTB(c)::S(F)
      • B(c);N_GUARD,S_CUTR(g)::S(F)
      • P(b);OGATEB::R(A),XP(b)
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