MESON Chess Problem Database

Problem Display
PID: 262734 (2R3KB/4N3/Q1p1p1pR/2Pp1p1B/2qpkPb1/6P1/3P4/4N3 w - - 0 1)

Shanshin, Valery Yurevich

1/2 HM., SuperProblem, 2018

2R3KB/4N3/Q1p1p1pR/2Pp1p1B/2qpkPb1/6P1/3P4/4N3

#2

12 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Qa2
      • 2.Qd3#
    • 1...Qd3
      • 2.Qxd3#
    • 1...Qc1
      • 2.Qd3#
    • 1...Qa4
      • 2.Qd3#
    • 1...Qb4
      • 2.Qd3#
    • 1...Qxc5
      • 2.Qd3#
    • 1...Bf3
      • 2.Bxf3#
    • 1...Bh3
      • 2.Bf3#
    • 1...gxh5
      • 2.Rxe6#
    • 1...g5
      • 2.Rxe6#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Sf6#
      • 1...Kxd5
        • 2.Qxc6#
      • 1...Qxd5
        • 2.Qd3#
      • 1...cxd5
        • 2.Qxe6#
      • 1...exd5
        • 2.Re8#
      • 1...d3
        • 2.Qxc4#
      • 1...e5!
    • 1.Qxc4?
      • threat
        • 2.Qd3#
        • 2.Qxd4#
      • 1...e5
        • 2.Qd3#
      • 1...Be2
        • 2.Qxe2#
        • 2.Qxd4#
      • 1...dxc4!
    • 1.d3+?
      • 1...Qxd3
        • 2.Qxd3#
      • 1...Ke3!
  • Keys
    • 1.Sxf5!
      • threat
        • 2.Sd6#
      • 1...Kxf5
        • 2.Bxg6#
      • 1...Qxc5
        • 2.Qd3#
      • 1...Bxf5
        • 2.Bf3#
      • 1...exf5
        • 2.Re8#
      • 1...gxf5
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • Q(a);OGATE::QAB1(G)
    • Q(a);OGATE::QAB1(G),XQ(a)
    • Q(a);OGATE,XP(E)::QAB1(G)
    • B(d);OGATE::B(F),XB(d)
    • B(d);OGATE::B(F)
    • P(i);OGATE,XB(F)::R(H),XP(h)
    • P(i);OGATE::R(H),XP(h)
  • Tries
    • Try
      • S(I);XP(e)
      • Threat
        • S(I)
      • Vars
        • K(c);OGATEB,S_FLIGHT,XS(I)::QAB1(G),XP(g)
        • Q(a);OGATE,SBLOCK,XS(I)::QAB1(G)
        • P(g);OGATE,XS(I)::QAR2(G),XP(h)
        • P(h);OGATEB,SBLOCK,XS(I)::R(J)
        • P(b);OGATEB::QAR2(G),XQ(a)
      • Refutation
        • P(h);P_PINS(I)
    • Try
      • Q(G);P_PINP(b),XQ(a)
      • Threat
        • DUALS(2)
      • Vars
        • P(h);::QAB1(G)
      • Refutation
        • P(e);N_SPINP(b),XQ(G)
    • Try
      • P(B);CHECK
      • Vars
        • Q(a);OGATE,XP(B)::QAB1(G),XQ(a)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • S(I);XP(f)
    • Threat
      • S(I)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XS(I)::B(F),XP(i)
      • Q(a);OGATE,XP(E)::QAB1(G)
      • B(d);OGATE,SBLOCK,XS(I)::B(F)
      • P(h);OGATEB,SBLOCK,XS(I)::R(J)
      • P(i);OGATE,SBLOCK,XS(I)::R(H),XP(h)
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