MESON Chess Problem Database

Problem Display
PID: 145849 (1nR2r1b/R2q2kp/7N/4NQP1/6K1/8/b2n4/8 w - - 0 1)

Reddmann, Hauke

Die Schwalbe, 2012

1nR2r1b/R2q2kp/7N/4NQP1/6K1/8/b2n4/8

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxa7
      • 2.Qxf8#
    • 1...Qb7
      • 2.Qxf8#
    • 1...Qc7
      • 2.Qxf8#
    • 1...Qe7
      • 2.Qxf8#
    • 1...Qf7
      • 2.Qf6#
    • 1...Rxf5
      • 2.Sxf5#
    • 1...Rf7
      • 2.Rg8#
  • Tries
    • 1.Kh4?
      • threat
        • 2.Qxf8#
      • 1...Rxf5
        • 2.Sxf5#
      • 1...Rxc8
        • 2.Qf6#
      • 1...Qf7
        • 2.Qf6#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rf7
        • 2.Rg8#
      • 1...Rd8
        • 2.Qf6#
      • 1...Re8
        • 2.Qf6#
      • 1...Rg8
        • 2.Qf6#
      • 1...Bf7
        • 2.Qf6#
      • 1...Sf3+!
    • 1.Rxd7+?
      • 1...Rf7
        • 2.Rg8#
        • 2.Qf6#
      • 1...Bf7
        • 2.Qf6#
      • 1...Sxd7!
  • Keys
    • 1.Kf4!
      • threat
        • 2.Qxf8#
      • 1...Rxf5+
        • 2.Sxf5#
      • 1...Rxc8
        • 2.Qf6#
      • 1...Qf7
        • 2.Qf6#
      • 1...Rf6
        • 2.Qxf6#
      • 1...Rf7
        • 2.Rg8#
      • 1...Rd8
        • 2.Qf6#
      • 1...Re8
        • 2.Qf6#
      • 1...Rg8
        • 2.Qf6#
      • 1...Bf7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 4
  • Sets
    • Q(c);N_PINQ(C),N_SPINQ(c),XR(F)::QAB1(C),XR(g)
    • Q(c);N_PINQ(C)::QAB1(C),XR(g)
    • Q(c);N_PINQ(C)::QAB1(C)
    • R(g);XQ(C)::S(E),XR(g)
    • R(g);N_SPINQ(c),OGATE::R1(G)
  • Tries
    • Try
      • K(A);N_SPINQ(C),P-FLIGHT
      • Threat
        • QAB1(C),XR(g)
      • Vars
        • R(g);XQ(C)::S(E),XR(g)
        • R(g);N_GUARD,XR(G)::QAB1(C)
        • Q(c);S_CUTR(g)::QAB1(C)
        • R(g);N_GUARD::QAB1(C),XR(g)
        • R(g);N_SPINQ(c),OGATE::R1(G)
        • R(g);N_GUARD::QAB1(C)
        • B(a);N_SPINQ(c),S_CUTR(g)::QAB1(C)
      • Refutation
        • S(b);CHECK
    • Try
      • R(F);CHECK,N_SPINQ(C),XQ(c)
      • Vars
        • B(a);P_SPINB(a)::QAB1(C)
      • Refutation
        • S(f);XR(F)
  • Actual
    • K(A);P-FLIGHT
    • Threat
      • QAB1(C),XR(g)
    • Vars
      • R(g);CHECK,XQ(C)::S(E),XR(g)
      • R(g);N_GUARD,N_PINQ(C),XR(G)::QAB1(C)
      • Q(c);S_CUTR(g)::QAB1(C)
      • R(g);N_GUARD::QAB1(C),XR(g)
      • R(g);N_SPINQ(c),OGATE::R1(G)
      • R(g);N_GUARD,N_PINQ(C)::QAB1(C)
      • B(a);N_PINQ(C),N_SPINQ(c),S_CUTR(g)::QAB1(C)
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