MESON Chess Problem Database

Problem Display
PID: 206370 (8/4K3/1p6/1Rr1k3/1Q3R2/1n6/5n2/8 w - - 0 1)

Kofman, Rafael Moiseevich

Revista de Sah, 1925

8/4K3/1p6/1Rr1k3/1Q3R2/1n6/5n2/8

#2

4 + 5

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rxb5
      • 2.Qd6#
    • 1...Rd5
      • 2.Qd6#
    • 1...Sd1
      • 2.Qe4#
    • 1...Sh1
      • 2.Qe4#
    • 1...Sd3
      • 2.Qe4#
    • 1...Sh3
      • 2.Qe4#
    • 1...Se4
      • 2.Qxe4#
    • 1...Sg4
      • 2.Qe4#
    • 1...Sa1
      • 2.Qd4#
    • 1...Sc1
      • 2.Qd4#
    • 1...Sd2
      • 2.Qd4#
    • 1...Sd4
      • 2.Qxd4#
    • 1...Sa5
      • 2.Qd4#
  • Tries
    • 1.Rxc5+?
      • 1...Sxc5
        • 2.Qd4#
      • 1...bxc5!
    • 1.Qe1+?
      • 1...Kd5
        • 2.Qe6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Kxf4!
    • 1.Qc4?
      • 1...Se4
        • 2.Qxe4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Rd5
        • 2.Rxd5#
        • 2.Qc7#
      • 1...Sd1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Sd3
        • 2.Qe4#
      • 1...Sh3
        • 2.Qe4#
      • 1...Sg4
        • 2.Qe4#
      • 1...Sa1
        • 2.Qd4#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sa5
        • 2.Qd4#
      • 1...Rxb5!
  • Keys
    • 1.Kd7!
      • 1...Rd5+
        • 2.Qd6#
      • 1...Kd5
        • 2.Rf5#
      • 1...Rxb5
        • 2.Qd6#
      • 1...Se4
        • 2.Qxe4#
      • 1...Sd4
        • 2.Qxd4#
      • 1...Sd1
        • 2.Qe4#
      • 1...Sh1
        • 2.Qe4#
      • 1...Sd3
        • 2.Qe4#
      • 1...Sh3
        • 2.Qe4#
      • 1...Sg4
        • 2.Qe4#
      • 1...Sa1
        • 2.Qd4#
      • 1...Sc1
        • 2.Qd4#
      • 1...Sd2
        • 2.Qd4#
      • 1...Sa5
        • 2.Qd4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);N_SPINR(c),OGATE,XR(C)::QAB1(A)
    • R(c);OGATE::QAB1(A)
    • S(a);N_GUARD::QAR1(A)
    • S(a);N_GUARD::QAR1(A),XS(a)
    • S(b);N_GUARD::QAB1(A)
    • S(b);N_GUARD::QAB1(A),XS(b)
  • Tries
    • Try
      • R(C);CHECK,XR(c)
      • Vars
        • S(b);XR(C)::QAB1(A)
      • Refutation
        • P(e);XR(C)
    • Try
      • Q(A);CHECK
      • Vars
        • K(d);OGATE,P-FLIGHT::QAB1(A)
        • S(a);N_GUARD,P_SPINS(a)::QAR1(A),XS(a)
      • Refutation
        • K(d);N_SPINR(c),S_FLIGHT,XR(B)
    • Try
      • Q(A);
      • Vars
        • S(a);N_GUARD::QAR1(A),XS(a)
        • S(b);N_GUARD::QAB1(A),XS(b)
        • S(a);N_GUARD::QAR1(A)
        • S(b);N_GUARD::QAB1(A)
      • Refutation
        • R(c);N_SPINR(c),XR(C)
  • Actual
    • K(D);P-FLIGHT
    • Vars
      • R(c);CHECK,OGATE::QAB1(A)
      • K(d);P-FLIGHT::R(B)
      • R(c);N_SPINR(c),OGATE,XR(C)::QAB1(A)
      • S(a);N_GUARD::QAR1(A),XS(a)
      • S(b);N_GUARD::QAB1(A),XS(b)
      • S(a);N_GUARD::QAR1(A)
      • S(b);N_GUARD::QAB1(A)
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