MESON Chess Problem Database

Problem Display
PID: 242256 (5b2/1n6/B1p3Qp/8/2qN4/2pP1R2/2NkP3/6RK w - - 0 1)

Kisis, Imants J

Shakhmaty (Riga), 1980

5b2/1n6/B1p3Qp/8/2qN4/2pP1R2/2NkP3/6RK

#2

9 + 7

5454 Near Snap 2021
15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qxd3
      • 2.Rxd3#
      • 2.Qxd3#
    • 1...Ba3
      • 2.Qxh6#
    • 1...Bb4
      • 2.Qxh6#
    • 1...Bc5
      • 2.Qxh6#
    • 1...h5
      • 2.Qg5#
  • Tries
    • 1.Rf2?
      • threat
        • 2.e3#
      • 1...Qd5+
        • 2.e4#
      • 1...Qxd3
        • 2.Qxd3#
        • 2.exd3#
      • 1...Qf7!
    • 1.Qg2?
      • threat
        • 2.e4#
      • 1...Qxd3
        • 2.Rxd3#
        • 2.exd3#
      • 1...Qxd4
        • 2.e3#
      • 1...Qg8!
    • 1.Qg3?
      • threat
        • 2.Qe1#
        • 2.Qf4#
      • 1...Qxd3
        • 2.Rxd3#
        • 2.Qe1#
      • 1...Qe6
        • 2.Qe1#
      • 1...Qf7
        • 2.Qe1#
      • 1...Bd6
        • 2.Qe1#
      • 1...Qxd4!
    • 1.e4?
      • threat
        • 2.Qg2#
      • 1...Qxd3
        • 2.Rxd3#
      • 1...Qg8
        • 2.Rf2#
      • 1...Qxd4!
  • Keys
    • 1.e3!
      • threat
        • 2.Rf2#
      • 1...Qxd3
        • 2.Qxd3#
      • 1...Qd5
        • 2.Qg2#
      • 1...Qf7
        • 2.Qg2#

Anticipated by 15140(1980)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • B(g);N_GUARD::QAB(I),XP(e)
    • P(e);N_GUARD::QAB(I)
  • Tries
    • Try
      • R(F);
      • Threat
        • R(F)+P(D)
      • Vars
        • Q(c);CHECK::R(F)+P(D)
      • Refutation
        • Q(c);
    • Try
      • Q(I);
      • Threat
        • QAR(I)+P(D)
      • Vars
        • Q(c);XS(G)::QAR(I)+P(D)
      • Refutation
        • Q(c);
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);::QAB1(I)
        • B(g);::QAB1(I)
      • Refutation
        • Q(c);XS(G)
    • Try
      • P(D);
      • Threat
        • QAR(I)
      • Vars
        • Q(c);OGATE,XP(E)::R1(F),XQ(c)
        • Q(c);::R(F)
      • Refutation
        • Q(c);XS(G)
  • Actual
    • P(D);
    • Threat
      • R(F)
    • Vars
      • Q(c);OGATE,XP(E)::QAR1(I),XQ(c)
      • Q(c);P_PINR(F)::QAR(I)
      • Q(c);::QAR(I)
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