MESON Chess Problem Database

Problem Display
PID: 22577 (q2r4/p3p1b1/b6p/7r/7R/N2k1P1Q/1P1PNRp1/2B3K1 w - - 0 1)

Popovski, Aleksandr

Falanga, 1994

q2r4/p3p1b1/b6p/7r/7R/N2k1P1Q/1P1PNRp1/2B3K1

#2

10 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qxf3
      • 2.Qxf3#
    • 1...Qe4
      • 2.fxe4#
    • 1...Bd4
      • 2.Sf4#
  • Tries
    • 1.Rd4+?
      • 1...Bxd4
        • 2.Sf4#
      • 1...Rxd4!
    • 1.Re4?
      • threat
        • 2.Sf4#
        • 2.Re3#
      • 1...Qb8
        • 2.Re3#
      • 1...Rh4
        • 2.Re3#
      • 1...Re5
        • 2.Sf4#
      • 1...Rf5
        • 2.Re3#
      • 1...Rf8
        • 2.Re3#
      • 1...Bd4
        • 2.Sf4#
      • 1...Be5
        • 2.Re3#
      • 1...e5
        • 2.Re3#
      • 1...Qxe4!
    • 1.Qf5+?
      • 1...Qe4
        • 2.Qxe4#
      • 1...Rxf5!
    • 1.f4+?
      • 1...Qf3
        • 2.Qxf3#
      • 1...Ke4!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qe3#
      • 1...Qxf3
        • 2.Rxf3#
      • 1...Qe4
        • 2.Qxe4#
      • 1...Re5
        • 2.Qb3#
      • 1...Bd4
        • 2.Sf4#
      • 1...Be5
        • 2.Qxa6#

There are these versions: 140721

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • Q(i);OGATE,P_SPINQ(i),XP(H)::QAR2(I),XQ(i)
    • Q(i);OGATE::QAR(I)+P(H),XQ(i)
    • B(h);P_PINR(F),SBLOCK::S(E)
  • Tries
    • Try
      • R(J);CHECK
      • Vars
        • B(h);P_PINR(F),SBLOCK,XR(J)::S(E)
      • Refutation
        • R(j);XR(J)
    • Try
      • R(J);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);::R1(J)
        • R(c);::R1(J)
        • R(c);::S(E)
        • R(j);::R1(J)
        • B(h);P_PINR(F)::S(E)
        • B(h);::R1(J)
        • P(g);::R1(J)
      • Refutation
        • Q(i);XR(J)
    • Try
      • Q(I);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAB1(I),XQ(i)
      • Refutation
        • R(c);XQ(I)
    • Try
      • P(H);CHECK
      • Vars
        • Q(i);N_GUARD,P_SPINQ(i)::QAR2(I),XQ(i)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • Q(i);OGATE,XP(H)::R(F),XQ(i)
      • Q(i);N_GUARD::QAB1(I),XQ(i)
      • R(c);S_CUTB(h)::QAR2(I)
      • B(h);P_PINR(F),SBLOCK::S(E)
      • B(h);S_CUTR(c)::QAB(I),XB(d)
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