MESON Chess Problem Database

Problem Display
PID: 273663 (7B/1P5Q/3PP1R1/4P3/4k3/1N2p3/4N1R1/1K6 w - - 0 1)

Groeneveld, Cornelis

4th HM., Zurcher Woche, 1959

7B/1P5Q/3PP1R1/4P3/4k3/1N2p3/4N1R1/1K6

#2

11 + 2

15601 Albrecht-Leiss-Degener Collection 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.R6g4#
    • 1...Kf3
      • 2.R6g3#
    • 1...Kf5
      • 2.Rh6#
  • Tries
    • 1.Ka1?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.Kc1?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.Ka2?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.Kb2?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.Kc2?
      • 1...Kf3
        • 2.R6g3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.Sc3+?
      • 1...Kf3
        • 2.Qf7#
      • 1...Kf4
        • 2.Qf7#
      • 1...Kf5
        • 2.Qf7#
      • 1...Kd3!
    • 1.Sbc1?
      • 1...Kf3
        • 2.R6g3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.Sc5+?
      • 1...Kf3
        • 2.R6g3#
        • 2.Qh3#
        • 2.Qh5#
        • 2.Qf7#
      • 1...Kf5
        • 2.R2g5#
        • 2.R6g3#
        • 2.R6g4#
        • 2.R6g5#
        • 2.Rh6#
        • 2.Rg8#
        • 2.Qh3#
        • 2.Qh5#
        • 2.Qf7#
      • 1...Kd5!
    • 1.Bg7?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.R6g4+?
      • 1...Kf3
        • 2.Sg1#
        • 2.Sed4#
        • 2.Sbd4#
        • 2.R4g3#
        • 2.Qe4#
        • 2.Qf5#
        • 2.Qh3#
        • 2.Qf7#
      • 1...Kd5!
    • 1.R6g5+?
      • 1...Kf3
        • 2.Sbd4#
        • 2.R5g3#
        • 2.Qf5#
      • 1...Kd5!
    • 1.Rg8+?
      • 1...Kf3
        • 2.Sbd4#
        • 2.R8g3#
        • 2.Qf5#
      • 1...Kd5!
    • 1.Qh1?
      • 1...Kf3
        • 2.Rh2#
      • 1...Kd5
        • 2.R2g4#
      • 1...Kf5
        • 2.R2g5#
      • 1...Kd3!
    • 1.Qh4+?
      • 1...Kd3
        • 2.Qd4#
      • 1...Kf3
        • 2.Sg1#
        • 2.Sed4#
        • 2.Sbd4#
        • 2.R6g3#
        • 2.Qf4#
        • 2.Qg4#
      • 1...Kf5
        • 2.Sed4#
        • 2.Sbd4#
        • 2.R2g5#
        • 2.Qf4#
        • 2.Qg4#
      • 1...Kd5!
    • 1.d7?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.e7?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.b8Q?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
        • 2.Qhb7#
        • 2.Qbb7#
        • 2.Qa8#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.b8S?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
        • 2.Qb7#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.b8B?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
        • 2.Qb7#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
    • 1.b8R?
      • 1...Kd3
        • 2.R6g4#
      • 1...Kf3
        • 2.R6g3#
        • 2.Qb7#
      • 1...Kf5
        • 2.Rh6#
      • 1...Kd5!
  • Keys
    • 1.Qc7!
      • 1...Kd3
        • 2.Qc2#
      • 1...Kf3
        • 2.Qc6#
      • 1...Kd5
        • 2.Sc3#
      • 1...Kf5
        • 2.Qc2#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
    • K(b);N_GUARD,S_FLIGHT::R1(H)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
        • K(b);N_GUARD,S_FLIGHT::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
        • K(b);N_GUARD,S_FLIGHT::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
        • K(b);N_GUARD,S_FLIGHT::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(A);P-FLIGHT
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
        • K(b);N_GUARD,S_FLIGHT::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • K(b);N_GUARD,S_FLIGHT::R1(H)
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(B);CHECK
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAR(J)
        • K(b);N_GUARD,P-FLIGHT::QAR(J)
        • K(b);N_GUARD,S_FLIGHT::QAR2(J)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::R1(H)
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • B(K);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
        • K(b);N_GUARD,S_FLIGHT::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(H);CHECK
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(C)
        • K(b);N_GUARD,S_FLIGHT::R1(C)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(J);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(J)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(F);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
        • K(b);N_GUARD,S_FLIGHT::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(G);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
        • K(b);N_GUARD,S_FLIGHT::R1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(I);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(I);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(I);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • P(I);
      • Vars
        • K(b);N_GUARD,S_FLIGHT::QAB(J)+R(H)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(J);
    • Vars
      • K(b);N_GUARD,S_FLIGHT::QAB1(J)
      • K(b);N_GUARD,S_FLIGHT::QAB(J)
      • K(b);N_GUARD,S_FLIGHT::S(B)
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