MESON Chess Problem Database

Problem Display
PID: 149264 (2N5/8/k1BK4/n1R5/8/8/3Q4/r3n3 w - - 0 1)

Dehler, Ernst Georg

Turnen und Sport, 1924

2N5/8/k1BK4/n1R5/8/8/3Q4/r3n3

#2

5 + 4

15148 Sadier Collection 2013

SOLUTION

  • SOUND
  • Sets
    • 1...Rb1
      • 2.Rxa5#
      • 2.Qxa5#
    • 1...Rc1
      • 2.Rxa5#
      • 2.Qxa5#
    • 1...Rd1
      • 2.Rxa5#
  • Tries
    • 1.Kc7?
      • threat
        • 2.Bb5#
      • 1...Rb1
        • 2.Rxa5#
        • 2.Qxa5#
      • 1...Sxc6!
    • 1.Qb4?
      • threat
        • 2.Qb5#
        • 2.Qb6#
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sb7+
        • 2.Bxb7#
        • 2.Qxb7#
      • 1...Rb1
        • 2.Rxa5#
        • 2.Qxa5#
      • 1...Rd1+!
    • 1.Qe2+?
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sd3!
    • 1.Qd3+?
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sxd3!
  • Keys
    • 1.Qd5!
      • threat
        • 2.Bb5#
      • 1...Sc4+
        • 2.Qxc4#
      • 1...Sb7+
        • 2.Bxb7#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Rb1
        • 2.Rxa5#
      • 1...Sb3
        • 2.Bb7#
        • 2.Qc4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 1
  • Sets
    • R(a);N_GUARD,P_PINQ(A)::R1(B),XS(c)
  • Tries
    • Try
      • K(D);S_FLIGHT
      • Threat
        • B(C)
      • Refutation
        • S(c);XB(C)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(c);CHECK,N_GUARD::QAB(A),XS(c)
      • Refutation
        • R(a);CHECK
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);CHECK,N_GUARD,P_SPINS(c)::QAB(A),XS(c)
      • Refutation
        • S(b);P_SPINS(b)
    • Try
      • Q(A);CHECK
      • Vars
        • S(c);CHECK,N_GUARD,P_SPINS(c)::QAB(A),XS(c)
      • Refutation
        • S(b);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • B(C)
    • Vars
      • S(c);CHECK,N_GUARD::QAB(A),XS(c)
      • S(c);CHECK,N_GUARD::B(C),XS(c)
      • S(c);OGATE,XB(C)::QAR2(A),XS(c)
      • R(a);N_GUARD::R1(B),XS(c)
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