MESON Chess Problem Database

Problem Display
PID: 17414 (3R4/8/qNP5/8/Q7/KBk5/8/8 w - - 0 1)

Seneca, Camil

Match: Paris - Prague, 1946

3R4/8/qNP5/8/Q7/KBk5/8/8

#2

6 + 2

5454 Near Snap 2007

SOLUTION

  • SOUND
  • Sets
    • 1...Qf1
      • 2.Qb4#
      • 2.Qd4#
      • 2.Qa5#
    • 1...Qe2
      • 2.Qb4#
      • 2.Qd4#
      • 2.Qa5#
    • 1...Qd3
      • 2.Qb4#
      • 2.Qa5#
    • 1...Qc4
      • 2.Qxc4#
    • 1...Qb5
      • 2.Qd4#
    • 1...Qb7
      • 2.Qb4#
      • 2.Qc4#
      • 2.Qd4#
      • 2.Qa5#
    • 1...Qc8
      • 2.Qb4#
      • 2.Qc4#
      • 2.Qd4#
      • 2.Qa5#
    • 1...Qxa4+
      • 2.Sxa4#
    • 1...Qa5
      • 2.Qxa5#
    • 1...Qxb6
      • 2.Qc4#
  • Tries
    • 1.Bc4?
      • threat
        • 2.Rd3#
      • 1...Qxc4
        • 2.Qxc4#
      • 1...Qxa4+!
    • 1.Rd3+?
      • 1...Qxd3
        • 2.Qb4#
      • 1...Kxd3!
  • Keys
    • 1.Rd1!
      • threat
        • 2.Sd5#
      • 1...Qxa4+
        • 2.Sxa4#
      • 1...Qxb6
        • 2.Qc4#
      • 1...Qb5
        • 2.Qd4#
      • 1...Qd3
        • 2.Qb4#
      • 1...Qc4
        • 2.Qxc4#
      • 1...Qa5
        • 2.Qxa5#

Anticipated by 40316(1935)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_PINQ(C)::QAR1(C),XQ(b)
    • Q(b);N_PINQ(C)::QAB1(C)
    • Q(b);CHECK,XQ(C)::S(D),XQ(b)
    • Q(b);N_GUARD::QAB(C),XQ(b)
    • Q(b);N_PINQ(C),XS(D)::QAR1(C)
  • Tries
    • Try
      • B(B);
      • Threat
        • R1(F)
      • Vars
        • Q(b);N_PINQ(C),XB(B)::QAR1(C),XQ(b)
      • Refutation
        • Q(b);CHECK,XQ(C)
    • Try
      • R(F);CHECK
      • Vars
        • Q(b);N_PINQ(C),SBLOCK,XR(F)::QAB1(C)
      • Refutation
        • K(a);P-FLIGHT,XR(F)
  • Actual
    • R(F);
    • Threat
      • S(D)
    • Vars
      • Q(b);CHECK,XQ(C)::S(D),XQ(b)
      • Q(b);N_PINQ(C),XS(D)::QAR1(C)
      • Q(b);N_PINQ(C)::QAB1(C)
      • Q(b);N_PINQ(C)::QAR1(C),XQ(b)
      • Q(b);N_GUARD::QAB(C),XQ(b)
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