MESON Chess Problem Database

Problem Display
PID: 261219 (4KnNr/3pp3/pbN1Rpp1/1b1k4/QB2pP2/r1R1P3/8/8 w - - 0 1)

Bakcsi, Gyorgy

Neue Zurcher Zeitung, 1981

4KnNr/3pp3/pbN1Rpp1/1b1k4/QB2pP2/r1R1P3/8/8

#2

9 + 12

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Sxe6
      • 2.Sxe7#
    • 1...f5
      • 2.Re5#
    • 1...dxe6
      • 2.Sxe7#
  • Tries
    • 1.Sxf6+?
      • 1...exf6
        • 2.Rd6#
      • 1...Kxe6!
    • 1.Qc2?
      • threat
        • 2.Qxe4#
      • 1...Kxe6
        • 2.Qxe4#
      • 1...Sxe6
        • 2.Sxe7#
      • 1...dxe6
        • 2.Sxe7#
      • 1...f5
        • 2.Re5#
      • 1...Bd3!
    • 1.Qb3+?
      • 1...Bc4
        • 2.Qxc4#
      • 1...Rxb3!
  • Keys
    • 1.Bxe7!
      • threat
        • 2.Rd6#
        • 2.Qxe4#
      • 1...Kxe6
        • 2.Qxe4#
      • 1...Rxc3
        • 2.Qxe4#
      • 1...Rxa4
        • 2.Rd6#
      • 1...Bxa4
        • 2.Rd6#
      • 1...Sxe6
        • 2.Sb4#
      • 1...dxe6
        • 2.Sxf6#
      • 1...Bd3
        • 2.Rd6#
      • 1...Bc4
        • 2.Qxc4#
      • 1...Bd4
        • 2.Rd6#
      • 1...Bc5
        • 2.Qxe4#
      • 1...Bc7
        • 2.Qxe4#
      • 1...f5
        • 2.Re5#
        • 2.Rd6#
      • 1...d6
        • 2.Rxd6#
        • 2.Qxe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 9
    • REMOVED MATES = 1
  • Sets
    • S(k);P_PINS(I),SBLOCK,XR(G)::S(F),XP(j)
    • P(g);N_GUARD::R1(G)
    • P(i);P_PINS(F),SBLOCK,XR(G)::S(I),XP(j)
  • Tries
    • Try
      • S(I);CHECK,XP(g)
      • Vars
        • P(j);XS(I)::R1(G)
      • Refutation
        • K(d);S_FLIGHT,XR(G)
    • Try
      • Q(C);
      • Threat
        • QAB1(C),XP(b)
      • Vars
        • K(d);S_FLIGHT,XR(G)::QAR2(C),XP(b)
        • S(k);P_PINS(I),SBLOCK,XR(G)::S(F),XP(j)
        • P(i);P_PINS(F),SBLOCK,XR(G)::S(I),XP(j)
        • P(g);N_GUARD::R1(G)
      • Refutation
        • B(c);
    • Try
      • Q(C);CHECK
      • Vars
        • B(c);N_GUARD,P_SPINB(c)::QAB1(C),XB(c)
      • Refutation
        • R(a);XQ(C)
  • Actual
    • B(D);XP(j)
    • Threat
      • DUALS(2)
    • Vars
      • K(d);S_FLIGHT,XR(G)::QAR2(C),XP(b)
      • R(a);XR(A)::QAB1(C),XP(b)
      • R(a);XQ(C)::R1(G)
      • B(c);XQ(C)::R1(G)
      • S(k);P_PINS(I),SBLOCK,XR(G)::S(F)
      • P(i);P_PINS(F),SBLOCK,XR(G)::S(I),XP(g)
      • B(c);::R1(G)
      • B(c);N_GUARD::QAB1(C),XB(c)
      • B(f);::R1(G)
      • B(f);::QAB1(C),XP(b)
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