MESON Chess Problem Database

Problem Display
PID: 203379 (B1b1R3/1q6/1P1pP3/8/4k1NN/1K6/3Q4/8 w - - 0 1)

Seib, Wilhelm

2nd Prize, Budapesti Sakkor, 1924

B1b1R3/1q6/1P1pP3/8/4k1NN/1K6/3Q4/8

#2

8 + 4

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5+
      • 2.Bxd5#
    • 1...Bxe6+
      • 2.Rxe6#
    • 1...Bd7
      • 2.exd7#
    • 1...d5
      • 2.Qe3#
  • Tries
    • 1.Bxb7+?
      • 1...d5
        • 2.Bxd5#
        • 2.Qe3#
      • 1...Bxb7!
    • 1.Rxc8?
      • threat
        • 2.Rc4#
      • 1...d5
        • 2.Qe3#
      • 1...Qc6!
    • 1.Rf8?
      • threat
        • 2.Rf4#
      • 1...Qd5+
        • 2.Bxd5#
        • 2.Qxd5#
      • 1...Bxe6+!
    • 1.Qc3?
      • threat
        • 2.Qc4#
      • 1...Kd5
        • 2.Sf6#
        • 2.Qc4#
      • 1...d5
        • 2.Qe3#
      • 1...Kf4!
    • 1.Qb4+?
      • 1...Kd5
        • 2.Qc4#
      • 1...Kd3!
    • 1.Qf4+?
      • 1...Kd3
        • 2.Qe3#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kxf4!
    • 1.Qc2+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf4!
    • 1.Qe2+?
      • 1...Kd4
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...Kf4!
  • Keys
    • 1.Qc1!
      • threat
        • 2.Qc4#
      • 1...Kd3
        • 2.Qe3#
      • 1...Kd4
        • 2.Qc4#
      • 1...Kd5
        • 2.Qc4#
      • 1...d5
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 3
  • Sets
    • Q(c);CHECK,N_PINP(E),OGATE::B(G),XQ(c)
    • B(d);CHECK,OGATE,P_SPINB(d),XP(F)::R(H),XB(d)
    • B(d);OGATE::R(H)+P(F),XB(d)
    • P(b);N_SPINQ(c),SBLOCK::QAR1(A)
  • Tries
    • Try
      • B(G);CHECK,N_SPINP(E),XQ(c)
      • Refutation
        • B(d);XB(G)
    • Try
      • R(H);XB(d)
      • Threat
        • R(H)
      • Vars
        • P(b);N_SPINQ(c),SBLOCK::QAR1(A)
      • Refutation
        • Q(c);N_PINP(E)
    • Try
      • R(H);
      • Threat
        • R1(H)
      • Refutation
        • B(d);CHECK,XP(F)
    • Try
      • Q(A);
      • Threat
        • QAR2(A)
      • Vars
        • P(b);N_SPINQ(c),SBLOCK::QAR1(A)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT
    • Try
      • Q(A);CHECK,N_SPINP(E)
      • Vars
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);N_SPINQ(c),S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_SPINQ(c),S_FLIGHT::QAR1(A)
        • K(a);OGATE,S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_SPINQ(c),P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);N_SPINQ(c),P-FLIGHT::QAR1(A)
        • K(a);S_FLIGHT::QAB1(A)
      • Refutation
        • K(a);N_SPINQ(c),P-FLIGHT
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(a);N_SPINQ(c),S_FLIGHT::QAR1(A)
      • K(a);N_SPINQ(c),P-FLIGHT::QAR1(A)
      • K(a);S_FLIGHT::QAB1(A)
      • P(b);N_SPINQ(c),SBLOCK::QAR1(A)
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