MESON Chess Problem Database

Problem Display
PID: 96424 (1Nbn4/r1R4Q/p1p2P2/2pk1p2/5B2/3BK3/1P6/8 w - - 0 1)

Grudzinski, Henryk

US Problem Bulletin, 1992

1Nbn4/r1R4Q/p1p2P2/2pk1p2/5B2/3BK3/1P6/8

#2

8 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke6
      • 2.Qxf5#
    • 1...Be6
      • 2.Qh1#
    • 1...Bb7
      • 2.Qxf5#
      • 2.Qd7#
    • 1...Bd7
      • 2.Qxd7#
    • 1...Se6
      • 2.Qxf5#
      • 2.Qh1#
  • Tries
    • 1.Be4+?
      • 1...Ke6
        • 2.Qxf5#
        • 2.Qe7#
      • 1...fxe4
        • 2.Qxe4#
      • 1...Kc4!
    • 1.Rd7+?
      • 1...Ke6
        • 2.Rd6#
        • 2.Qxf5#
        • 2.Qe7#
      • 1...Rxd7
        • 2.Qxf5#
      • 1...Bxd7!
    • 1.Qg8+?
      • 1...Be6
        • 2.Qg2#
      • 1...Se6
        • 2.Qg2#
      • 1...Sf7!
    • 1.Qe7?
      • threat
        • 2.Qd6#
        • 2.Qe5#
      • 1...Be6
        • 2.Qd6#
      • 1...Se6
        • 2.Qd6#
      • 1...Sb7
        • 2.Qe5#
      • 1...Sf7!
    • 1.b3?
      • threat
        • 2.Bc4#
      • 1...Ke6
        • 2.Qxf5#
      • 1...c4!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qxf5#
      • 1...Ke6
        • 2.Bc4#
      • 1...Bxd7
        • 2.Qxd7#
      • 1...Sf7
        • 2.Qxf7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • K(b);S_FLIGHT::QAB1(G),XP(c)
    • B(g);SBLOCK::QAB(G)
    • B(g);N_GUARD::QAR2(G),XB(g)
  • Tries
    • Try
      • B(B);CHECK
      • Vars
        • P(c);OGATE,XB(B)::QAB1(G),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(F);CHECK
      • Vars
        • R(f);XR(F)::QAR2(G),XP(c)
      • Refutation
        • B(g);XR(F)
    • Try
      • Q(G);CHECK
      • Vars
        • B(g);P_SPINB(g),SBLOCK::QAB(G)
        • S(h);P_SPINS(h),SBLOCK::QAB(G)
      • Refutation
        • S(h);P_SPINS(h)
    • Try
      • Q(G);
      • Threat
        • DUALS(2)
      • Vars
        • B(g);::QAR1(G)
        • S(h);::QAR1(G)
      • Refutation
        • S(h);
    • Try
      • P(A);
      • Threat
        • B(B)
      • Vars
        • K(b);S_FLIGHT::QAB1(G),XP(c)
      • Refutation
        • P(a);
  • Actual
    • S(H);
    • Threat
      • QAR2(G),XP(c)
    • Vars
      • K(b);S_FLIGHT::B(B)
      • B(g);OGATE,XS(H)::QAR2(G),XB(g)
      • S(h);N_GUARD::QAB(G),XS(h)
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