MESON Chess Problem Database

Problem Display
PID: 11200 (1Bn5/3Rr3/3r1p2/5P2/R2Pk3/8/3KB2N/3Q4 w - - 0 1)

Maass, W

Chess, 1937

1Bn5/3Rr3/3r1p2/5P2/R2Pk3/8/3KB2N/3Q4

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd4+
      • 2.Bd3#
    • 1...Rd5
      • 2.Bd3#
      • 2.Qc2#
      • 2.Qb1#
    • 1...Ra6
      • 2.Bd3#
      • 2.Qc2#
      • 2.Qb1#
    • 1...Rb6
      • 2.Bd3#
      • 2.Qc2#
    • 1...Rc6
      • 2.Bd3#
    • 1...Rde6
      • 2.Bd3#
      • 2.Qc2#
      • 2.Qb1#
  • Tries
    • 1.Bf1?
      • threat
        • 2.Qf3#
      • 1...Rxd4+
        • 2.Bd3#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Kd5!
    • 1.Bd3+?
      • 1...Kf4
        • 2.Qg4#
      • 1...Kd5!
    • 1.Bb5?
      • threat
        • 2.Qf3#
      • 1...Rxd4+
        • 2.Bd3#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Kd5!
    • 1.Qb1+?
      • 1...Kd5
        • 2.Qb7#
      • 1...Kf4!
    • 1.Qf1?
      • threat
        • 2.Qf3#
      • 1...Rxd4+
        • 2.Bd3#
        • 2.Raxd4#
        • 2.Rdxd4#
      • 1...Kd5!
  • Keys
    • 1.Ba6!
      • threat
        • 2.Qf3#
      • 1...Rxd4+
        • 2.Bd3#
      • 1...Kf4
        • 2.Qg4#
      • 1...Kd5
        • 2.Bb7#
      • 1...Kxf5
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • R(b);CHECK,P_SPINR(b),XP(F)::B(C)
    • R(b);N_PINP(F)::B(C)
  • Tries
    • Try
      • B(C);
      • Threat
        • QAB1(A)
      • Vars
        • R(b);CHECK,P_SPINR(b),XP(F)::B(C)
        • K(a);P-FLIGHT,P_SPINR(b)::QAR1(A)
        • K(a);S_FLIGHT,XP(G)::QAB1(A)
      • Refutation
        • K(a);N_PINP(F),P_SPINR(b),S_FLIGHT
    • Try
      • B(C);CHECK,N_SPINP(F)
      • Vars
        • K(a);P-FLIGHT,P_SPINR(b)::QAR1(A)
      • Refutation
        • K(a);P_SPINR(b),S_FLIGHT
    • Try
      • B(C);
      • Threat
        • QAB1(A)
      • Vars
        • R(b);CHECK,P_SPINR(b),XP(F)::B(C)
        • K(a);P-FLIGHT,P_SPINR(b)::QAR1(A)
        • K(a);S_FLIGHT,XP(G)::QAB1(A)
      • Refutation
        • K(a);N_PINP(F),P_SPINR(b),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_PINP(F),P_SPINR(b),S_FLIGHT::QAB(A)
      • Refutation
        • K(a);P-FLIGHT,P_SPINR(b)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Refutation
        • K(a);N_PINP(F),P_SPINR(b),S_FLIGHT
  • Actual
    • B(C);
    • Threat
      • QAB1(A)
    • Vars
      • R(b);CHECK,P_SPINR(b),XP(F)::B(C)
      • K(a);P-FLIGHT,P_SPINR(b)::QAR1(A)
      • K(a);N_PINP(F),P_SPINR(b),S_FLIGHT::B(C)
      • K(a);S_FLIGHT,XP(G)::QAB1(A)
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