MESON Chess Problem Database

Problem Display
PID: 206573 (8/3p4/p7/b2R4/QNk1P3/8/K7/n7 w - - 0 1)

Tomchinsky, ?

64 Shakhmatnoe obozrenie, 1925

8/3p4/p7/b2R4/QNk1P3/8/K7/n7

#2

5 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qb3#
    • 1...Sb3
      • 2.Qxb3#
  • Tries
    • 1.Kb2?
      • 1...Bxb4
        • 2.Qxa6#
      • 1...Bb6
        • 2.Sa2#
        • 2.Sc2#
        • 2.Sd3#
        • 2.Sxa6#
        • 2.Sc6#
      • 1...Bc7
        • 2.Sa2#
        • 2.Sc2#
        • 2.Sd3#
        • 2.Sxa6#
        • 2.Sc6#
      • 1...Bd8
        • 2.Sa2#
        • 2.Sc2#
        • 2.Sd3#
        • 2.Sxa6#
        • 2.Sc6#
      • 1...Sc2
        • 2.Qb3#
      • 1...Sb3
        • 2.Qxb3#
      • 1...d6!
    • 1.Sc2+?
      • 1...Bb4
        • 2.Qxb4#
      • 1...Kc3!
    • 1.Sd3+?
      • 1...Bb4
        • 2.Qxb4#
      • 1...Kc3!
    • 1.Sxa6+?
      • 1...Bb4
        • 2.Qxb4#
      • 1...Kc3!
    • 1.Sc6+?
      • 1...Bb4
        • 2.Qxb4#
      • 1...Kc3!
    • 1.Qb5+?
      • 1...Kc3
        • 2.Rd3#
        • 2.Qc5#
      • 1...axb5!
    • 1.Qc6+?
      • 1...Kxb4
        • 2.Rd4#
      • 1...dxc6!
  • Keys
    • 1.Ka3!
      • 1...Bxb4+
        • 2.Qxb4#
      • 1...Sc2+
        • 2.Qxc2#
      • 1...Kc3
        • 2.Sa2#
      • 1...d6
        • 2.Qc6#
      • 1...Bb6
        • 2.Sa2#
      • 1...Bc7
        • 2.Sa2#
      • 1...Bd8
        • 2.Sa2#
      • 1...Sb3
        • 2.Qxb3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::QAB1(B)
    • S(a);N_GUARD::QAB1(B),XS(a)
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • B(c);OGATE,P_SPINB(c),SBLOCK,XS(C)::QAB(B),XP(d)
        • S(a);N_GUARD::QAB1(B)
        • S(a);N_GUARD::QAB1(B),XS(a)
      • Refutation
        • P(e);
    • Try
      • S(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(B),XB(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(B),XB(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK,XP(d)
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(B),XB(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • S(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAR1(B),XB(c)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • P(d);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);P-FLIGHT,XS(C)::R(E)
      • Refutation
        • P(e);XQ(B)
  • Actual
    • K(A);P-FLIGHT
    • Vars
      • B(c);CHECK,OGATE,P_SPINB(c),XS(C)::QAR1(B),XB(c)
      • S(a);CHECK,N_GUARD::QAR2(B),XS(a)
      • K(b);P-FLIGHT::S(C)
      • P(e);N_GUARD::QAR2(B)
      • B(c);N_GUARD::QAR(B)+S(C)
      • S(a);N_GUARD::QAB1(B),XS(a)
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