MESON Chess Problem Database

Problem Display
PID: 225832 (4N2B/p3b1n1/2pP4/R1pkNB2/R2p4/5K2/pn6/Q7 w - - 0 1)

Varitsky, Aleksandr Nikolaevich

Praca, 2001

4N2B/p3b1n1/2pP4/R1pkNB2/R2p4/5K2/pn6/Q7

#2

9 + 9

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe5
      • 2.Rxc5#
    • 1...Sd1
      • 2.Qxd4#
    • 1...Sd3
      • 2.Qxd4#
    • 1...Se6
      • 2.Be4#
  • Tries
    • 1.Sd7?
      • threat
        • 2.Rxc5#
      • 1...Bxd6
        • 2.Sef6#
      • 1...Sxa4
        • 2.Qxa2#
      • 1...Sxe8
        • 2.Rxd4#
      • 1...Sd3
        • 2.Rxd4#
        • 2.Qxd4#
        • 2.Qxa2#
      • 1...Se6
        • 2.Be4#
      • 1...Sxf5!
    • 1.Sf7?
      • threat
        • 2.Sc7#
      • 1...Bxd6
        • 2.Sf6#
      • 1...Sxa4
        • 2.Qxa2#
      • 1...Sxe8
        • 2.Rxd4#
      • 1...Se6
        • 2.Be4#
      • 1...Bd8!
    • 1.Qxa2+?
      • 1...Kxe5
        • 2.Rxc5#
        • 2.Qe6#
      • 1...Sc4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Rxc5#
      • 1...Bxd6
        • 2.Sf6#
      • 1...Sxd3
        • 2.Qxd4#
      • 1...Sxa4
        • 2.Qxa2#
      • 1...Sxf5
        • 2.Sf4#
      • 1...Sxe8
        • 2.Rxd4#
      • 1...Se6
        • 2.Be4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • K(e);P-FLIGHT,P_SPINS(i),XS(E)::R(D),XP(d)
    • S(b);OGATE::QAR1(A),XP(c)
    • S(i);SBLOCK::B(F)
  • Tries
    • Try
      • S(E);
      • Threat
        • R1(D),XP(d)
      • Vars
        • B(h);N_GUARD,SBLOCK,XP(G)::S(H)
        • S(b);N_GUARD,XR(C)::QAB(A),XP(a)
        • S(i);XS(H)::R1(C),XP(c)
        • S(i);SBLOCK::B(F)
      • Refutation
        • S(i);XB(F)
    • Try
      • S(E);
      • Threat
        • S(H)
      • Vars
        • B(h);N_GUARD,XP(G)::S(H)
        • S(b);N_GUARD,XR(C)::QAB(A),XP(a)
        • S(i);XS(H)::R1(C),XP(c)
        • S(i);SBLOCK::B(F)
      • Refutation
        • B(h);
    • Try
      • Q(A);CHECK,XP(a)
      • Refutation
        • S(b);P_SPINS(b)
  • Actual
    • S(E);
    • Threat
      • R1(D),XP(d)
    • Vars
      • B(h);N_GUARD,SBLOCK,XP(G)::S(H)
      • S(b);OGATE,XS(E)::QAR1(A),XP(c)
      • S(b);N_GUARD,XR(C)::QAB(A),XP(a)
      • S(i);XB(F)::S(E)
      • S(i);XS(H)::R1(C),XP(c)
      • S(i);SBLOCK::B(F)
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