MESON Chess Problem Database

Problem Display
PID: 176423 (8/1B3N2/2n1pp2/rR1r2bR/1P2k3/pQ2N1PK/2pP2P1/1b6 w - - 0 1)

Gab, Wolfgang

Schach-Echo, 1982

8/1B3N2/2n1pp2/rR1r2bR/1P2k3/pQ2N1PK/2pP2P1/1b6

#2

11 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qc4#
    • 1...Rxb5
      • 2.Qc4#
    • 1...Re5
      • 2.Qc4#
    • 1...Rf5
      • 2.Qc4#
    • 1...Bxe3
      • 2.Qxe3#
    • 1...Bh4
      • 2.Rxh4#
    • 1...Sxb4
      • 2.Rxb4#
      • 2.Qc4#
    • 1...Sa7
      • 2.Qc4#
    • 1...Se7
      • 2.Qc4#
    • 1...Sb8
      • 2.Qc4#
    • 1...Sd8
      • 2.Qc4#
    • 1...e5
      • 2.Qxd5#
  • Tries
    • 1.Rh4+?
      • 1...Bf4
        • 2.Rxf4#
      • 1...Bxh4!
    • 1.Qc4+?
      • 1...Rd4
        • 2.Sd6#
        • 2.Bxc6#
      • 1...Sd4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Qf3#
      • 1...Kxf5
        • 2.Qd3#
      • 1...Rxf5
        • 2.Qc4#
      • 1...exf5
        • 2.Qxd5#
      • 1...Rd3
        • 2.Qxe6#
      • 1...Be3
        • 2.Qxe3#
      • 1...Sd4
        • 2.S5d6#
      • 1...Se5
        • 2.S7d6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • K(d);P-FLIGHT::QAR1(C)
    • R(f);N_GUARD,P_SPINS(h),XR(H)::QAR2(C)
    • R(f);N_GUARD,P_SPINS(h)::QAR2(C)
    • B(g);OGATE,XS(D)::QAR1(C),XB(g)
    • B(g);N_GUARD::R(I),XB(g)
    • S(h);N_GUARD,P_SPINR(f)::QAR2(C)
    • P(i);N_GUARD::QAB1(C),XR(f)
  • Tries
    • Try
      • R(I);CHECK
      • Vars
        • B(g);N_GUARD,P_SPINB(g)::R1(I),XB(g)
      • Refutation
        • B(g);XR(I)
    • Try
      • Q(C);CHECK
      • Refutation
        • S(h);P_SPINR(f),P_SPINS(h)
  • Actual
    • S(D);
    • Threat
      • QAB1(C)
    • Vars
      • K(d);P_SPINB(g),P_SPINR(f),S_FLIGHT,XS(D)::QAB(C)
      • R(f);N_GUARD,P_SPINS(h),XS(D)::QAR2(C)
      • P(i);N_GUARD,XS(D)::QAB1(C),XR(f)
      • R(f);OGATE,P_PINP(E),P_SPINS(h),SBLOCK::QAR2(C),XP(i)
      • B(g);N_GUARD::QAR1(C),XB(g)
      • S(h);P_SPINR(f),SBLOCK::S(D)
      • S(h);P_SPINR(f),SBLOCK::S(K)
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