MESON Chess Problem Database

Problem Display
PID: 233465 (8/7Q/8/3p4/r1pN4/P1k5/p2NPB2/K3n3 w - - 0 1)

Rosenthal, Moisej Schlemowitsch

Freie Presse, 0000

8/7Q/8/3p4/r1pN4/P1k5/p2NPB2/K3n3

#2

7 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2+
      • 2.Qxc2#
    • 1...Sg2
      • 2.Qc2#
    • 1...Sf3
      • 2.Qc2#
  • Tries
    • 1.S2f3?
      • threat
        • 2.Bxe1#
      • 1...Sc2+
        • 2.Qxc2#
      • 1...Sxf3
        • 2.Qc2#
      • 1...Sg2
        • 2.Qc2#
      • 1...Sd3!
    • 1.Bxe1?
      • threat
        • 2.S2b3#
        • 2.S2f3#
        • 2.Sb5#
      • 1...Rxa3
        • 2.S2b3#
        • 2.S2f3#
      • 1...Rb4
        • 2.S2b3#
        • 2.S2f3#
      • 1...Ra5
        • 2.S2b3#
        • 2.S2f3#
      • 1...Kxd4!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Qb2#
      • 1...Sc2+
        • 2.Qxc2#
      • 1...axb1Q+
        • 2.Sxb1#
      • 1...axb1R+
        • 2.Sxb1#
      • 1...Kxd2
        • 2.Qxe1#
      • 1...axb1S
        • 2.Sxb1#
      • 1...axb1B
        • 2.Sxb1#
      • 1...Sd3
        • 2.Qc2#
      • 1...Rb4
        • 2.Qxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 2
  • Sets
    • S(a);CHECK,N_GUARD::QAR1(G),XS(a)
    • S(a);N_GUARD::QAR1(G)
  • Tries
    • Try
      • S(B);
      • Threat
        • B(D),XS(a)
      • Vars
        • S(a);CHECK,N_GUARD::QAR1(G),XS(a)
        • S(a);N_GUARD,XS(B)::QAR1(G)
        • S(a);N_GUARD::QAR1(G)
      • Refutation
        • S(a);
    • Try
      • B(D);XS(a)
      • Threat
        • DUALS(3)
      • Refutation
        • K(c);S_FLIGHT,XS(F)
  • Actual
    • Q(G);
    • Threat
      • QAB1(G)
    • Vars
      • S(a);CHECK,N_GUARD::QAR1(G),XS(a)
      • P(b);CHECK,P_PINP(E),XQ(G)::S(B),XQ(b)
      • P(b);CHECK,P_PINP(E),XQ(G)::S(B),XR(b)
      • K(c);OGATEB,S_FLIGHT,XS(B)::QAB1(G),XS(a)
      • P(b);P_PINP(E),XQ(G)::S(B),XS(b)
      • P(b);P_PINP(E),XQ(G)::S(B),XB(b)
      • S(a);N_GUARD::QAR1(G)
      • R(d);N_GUARD::QAB1(G),XR(d)
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Developed and maintained by Brian Stephenson.
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