MESON Chess Problem Database

Problem Display
PID: 261288 (8/2p2p1p/2R2Pbr/3P3p/2N1kB1P/1p2P2P/1P4Rp/1K1Q4 w - - 0 1)

Machler, Emil

Neue Zurcher Zeitung, 1984

8/2p2p1p/2R2Pbr/3P3p/2N1kB1P/1p2P2P/1P4Rp/1K1Q4

#2

12 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Kf5
      • 2.Qd3#
  • Tries
    • 1.Sd2+?
      • 1...Kd3
        • 2.Rc3#
        • 2.Qe2#
        • 2.Qxb3#
        • 2.Qf1#
      • 1...Kf5
        • 2.Rg5#
      • 1...Kxd5+!
    • 1.Bxh2?
      • 1...Kf5
        • 2.Qf3#
        • 2.Qd3#
      • 1...Bf5!
    • 1.Rxh2?
      • 1...Kf5
        • 2.Qd3#
      • 1...Bf5!
    • 1.Re6+?
      • 1...Kf5
        • 2.Rg5#
        • 2.Qd3#
      • 1...fxe6!
    • 1.Qf3+?
      • 1...Kd3
        • 2.Se5#
        • 2.Rd2#
      • 1...Kf5
        • 2.Bxh2#
        • 2.Bg3#
        • 2.Be5#
        • 2.Bg5#
        • 2.Bd6#
        • 2.Bxh6#
        • 2.Bxc7#
        • 2.Rg5#
        • 2.e4#
      • 1...Kxf3+!
    • 1.Qd4+?
      • 1...Kf5
        • 2.Rg5#
        • 2.Qe5#
        • 2.Qd3#
      • 1...Kf3+!
  • Keys
    • 1.Qh1!
      • 1...Kf3+
        • 2.Rc2#
      • 1...Kxd5+
        • 2.Rxg6#
      • 1...Kd3
        • 2.Rd2#
      • 1...Kf5
        • 2.Rg5#
      • 1...Bf5
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,S_FLIGHT::QAB(B)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(c);N_GUARD,S_FLIGHT::R1(D)
      • Refutation
        • K(c);CHECK,S_FLIGHT,XP(J)
    • Try
      • B(H);XP(a)
      • Refutation
        • B(e);
    • Try
      • R(D);XP(a)
      • Vars
        • K(c);N_GUARD,S_FLIGHT::QAB(B)
      • Refutation
        • B(e);
    • Try
      • R(K);CHECK
      • Refutation
        • P(h);XR(K)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);CHECK,S_FLIGHT,XQ(B)
    • Try
      • Q(B);CHECK
      • Refutation
        • K(c);CHECK,S_FLIGHT
  • Actual
    • Q(B);
    • Vars
      • K(c);CHECK,N_GUARD,S_FLIGHT::QAB(B)+R(D)
      • K(c);CHECK,N_GUARD,S_FLIGHT,XP(J)::QAB(B)+R(D),XB(e)
      • K(c);N_GUARD,S_FLIGHT::R1(D)
      • B(e);SBLOCK::QAB(B)+R(D)
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