MESON Chess Problem Database

Problem Display
PID: 251614 (4r1B1/2q3Q1/R4R2/1n2kN1N/1B2p3/3rp3/4n2K/8 w - - 0 1)

Dowd, Steven B

Problemas, 2021

4r1B1/2q3Q1/R4R2/1n2kN1N/1B2p3/3rp3/4n2K/8

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qa5
      • 2.Rf8#
    • 1...Qb8
      • 2.Rf8#
    • 1...Qc1
      • 2.Rf8#
    • 1...Qc2
      • 2.Rf8#
    • 1...Qc3
      • 2.Rf8#
    • 1...Qc4
      • 2.Rf8#
    • 1...Qc5
      • 2.Rf8#
    • 1...Qc8
      • 2.Rf8#
    • 1...Rd5
      • 2.Rf7#
    • 1...Sc1
      • 2.Qg3#
    • 1...Sg1
      • 2.Qg3#
    • 1...Sec3
      • 2.Qg3#
    • 1...Sg3
      • 2.Qxg3#
    • 1...Sed4
      • 2.Qg3#
    • 1...Sbd4
      • 2.Qxc7#
  • Tries
    • 1.Sh4?
      • threat
        • 2.Rf5#
      • 1...Kd4+
        • 2.Rfd6#
      • 1...Qxg7!
    • 1.Sh6?
      • threat
        • 2.Rf5#
      • 1...Kd4+
        • 2.Rfd6#
      • 1...Qxg7!
    • 1.Rfd6+?
      • 1...Kxf5
        • 2.Bh7#
      • 1...Qxg7!
    • 1.Rfe6+?
      • 1...Kd5+
        • 2.Re5#
        • 2.Red6#
      • 1...Kxf5+!
    • 1.Qg3+?
      • 1...Sf4
        • 2.Qxf4#
      • 1...Sxg3!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Rf5#
      • 1...Kxd4+
        • 2.Rfd6#
      • 1...Qxg7
        • 2.Sc6#
      • 1...Rxd4
        • 2.Qg5#
      • 1...Sexd4
        • 2.Qg3#
      • 1...Sbxd4
        • 2.Qxc7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 13
  • Sets
    • Q(g);N_GUARD::QAB(G)+R(F)
    • R(b);SBLOCK::QAB(G)+R(F)
    • S(a);N_GUARD::QAB(G)
    • S(a);N_GUARD::QAB(G),XS(a)
    • S(e);N_GUARD,S_CUTR(b)::QAB(G),XQ(g)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB(G)+R(F),DCHECK
      • Vars
        • K(f);CHECK,S_FLIGHT::QAB(G)+R(F),DCHECK
      • Refutation
        • Q(g);XQ(G)
    • Try
      • S(C);
      • Threat
        • QAB(G)+R(F),DCHECK
      • Vars
        • K(f);CHECK,S_FLIGHT::QAB(G)+R(F),DCHECK
      • Refutation
        • Q(g);XQ(G)
    • Try
      • R(F);CHECK
      • Vars
        • K(f);P-FLIGHT,P_PINR(F),S_CUTQ(g),XS(C)::B(H)
      • Refutation
        • Q(g);XQ(G)
    • Try
      • R(F);CHECK
      • Refutation
        • K(f);CHECK,P-FLIGHT,XS(C)
    • Try
      • Q(G);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAB1(G),XS(a)
      • Refutation
        • S(a);XQ(G)
  • Actual
    • S(C);
    • Threat
      • QAB(G)+R(F),DCHECK
    • Vars
      • K(f);CHECK,S_FLIGHT,XS(C)::QAB(G)+R(F),DCHECK
      • Q(g);N_GUARD,XQ(G)::S(C)
      • R(b);SBLOCK,XS(C)::QAR2(G)
      • S(a);N_GUARD,SBLOCK,XS(C)::QAB(G)
      • S(e);N_GUARD,SBLOCK,XS(C)::QAB(G),XQ(g)
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