MESON Chess Problem Database

Problem Display
PID: 120767 (6B1/8/5Q2/3b4/4R3/1PPkb3/1K1n3N/3Rr3 w - - 0 1)

Vogel, Peter

Source?, 0000

6B1/8/5Q2/3b4/4R3/1PPkb3/1K1n3N/3Rr3

#2

8 + 5

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Bh7#
    • 1...Bd4
      • 2.Qxd4#
    • 1...Bf4
      • 2.Qd4#
    • 1...Bg5
      • 2.Qd4#
    • 1...Bh6
      • 2.Qd4#
    • 1...Bxe4
      • 2.Bc4#
      • 2.Qa6#
  • Tries
    • 1.Rxd2+?
      • 1...Kxe4
        • 2.Bxd5#
        • 2.Bh7#
      • 1...Bxd2
        • 2.Qd4#
      • 1...Kxd2!
    • 1.Qd4+?
      • 1...Ke2
        • 2.Rxd2#
        • 2.Qxd2#
      • 1...Bxd4!
    • 1.Qa6+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Kxe4!
  • Keys
    • 1.Qf3!
      • threat
        • 2.Rd4#
      • 1...Bxe4
        • 2.Bc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 5
  • Sets
    • K(c);N_SPINS(b),OGATEB,S_FLIGHT,XR(F)::B(H)
    • B(d);N_GUARD,P_PINP(E)::QAR1(G),XB(d)
    • B(d);N_GUARD::QAR1(G)
  • Tries
    • Try
      • R(A);CHECK,XS(b)
      • Vars
        • B(d);SBLOCK,XR(A)::QAR1(G)
      • Refutation
        • K(c);P-FLIGHT,XR(A)
    • Try
      • Q(G);CHECK
      • Refutation
        • B(d);P_PINP(E),XQ(G)
    • Try
      • Q(G);CHECK
      • Vars
        • B(e);N_GUARD,P_SPINB(e)::QAB1(G),XB(e)
      • Refutation
        • K(c);N_SPINS(b),S_FLIGHT,XR(F)
  • Actual
    • Q(G);P_PINB(d)
    • Threat
      • R1(F)
    • Vars
      • B(e);OGATE,XR(F)::B(H)
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