MESON Chess Problem Database

Problem Display
PID: 70663 (KnN5/p5R1/ppP2P1p/3k4/PQ2p3/1p1Np3/b4R2/1B1r1r2 w - - 0 1)

Valuska, Jan

7th HM., Mat, 1978

KnN5/p5R1/ppP2P1p/3k4/PQ2p3/1p1Np3/b4R2/1B1r1r2

#2

10 + 12

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kxc6
      • 2.Qd6#
      • 2.Qc4#
      • 2.Qxe4#
    • 1...Ke6
      • 2.Qd6#
      • 2.Qc4#
      • 2.Qxe4#
  • Tries
    • 1.Sf4+?
      • 1...Kxc6
        • 2.Sxa7#
        • 2.Qc3#
        • 2.Qc4#
      • 1...Ke5!
    • 1.Se5?
      • threat
        • 2.Qd6#
      • 1...Kxe5
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Sxb6+?
      • 1...Kxc6
        • 2.Se5#
        • 2.Qc5#
      • 1...Ke6
        • 2.Re7#
        • 2.Qe7#
      • 1...axb6!
    • 1.Rf5+?
      • 1...Kxc6
        • 2.Sxa7#
        • 2.Qc3#
        • 2.Qd6#
        • 2.Qc4#
        • 2.Qxe4#
      • 1...Ke6
        • 2.Qxe4#
      • 1...Rxf5!
    • 1.Rg4?
      • threat
        • 2.Qxe4#
      • 1...Kxc6
        • 2.Qd6#
      • 1...Ke6
        • 2.Qc4#
      • 1...exd3
        • 2.Qd6#
      • 1...Rxd3!
    • 1.Rg5+?
      • 1...Kxc6
        • 2.Qd6#
      • 1...Ke6
        • 2.Qe7#
        • 2.Qc4#
      • 1...hxg5!
    • 1.Rd7+?
      • 1...Kxc6
        • 2.Se5#
        • 2.Qd6#
      • 1...Ke6
        • 2.Qd6#
        • 2.Qe7#
        • 2.Qc4#
        • 2.Qxe4#
      • 1...Sxd7!
    • 1.Qc5+?
      • 1...Ke6
        • 2.Re7#
        • 2.Qd6#
        • 2.Qc4#
        • 2.Qe5#
        • 2.Qf5#
      • 1...bxc5!
    • 1.Qd4+?
      • 1...Kxc6
        • 2.Sb4#
        • 2.Se5#
        • 2.Sxa7#
        • 2.Qc4#
        • 2.Qxe4#
        • 2.Qd6#
      • 1...Ke6
        • 2.Re7#
        • 2.Qe5#
        • 2.Qc4#
        • 2.Qxe4#
        • 2.Qd6#
      • 1...Kxd4!
  • Keys
    • 1.Sb2!
      • threat
        • 2.Qd6#
      • 1...Ke5
        • 2.Qxe4#
      • 1...Kxc6
        • 2.Qc4#
      • 1...Ke6
        • 2.Qxe4#

This anticipates 108764(1988), 109600(1988)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);CHECK
      • Refutation
        • K(g);P-FLIGHT
    • Try
      • S(C);
      • Threat
        • QAR1(E)
      • Vars
        • K(g);P-FLIGHT,XS(C)::QAR1(E),XP(f)
      • Refutation
        • K(g);S_FLIGHT
    • Try
      • S(J);CHECK,XP(i)
      • Refutation
        • P(k);XS(J)
    • Try
      • R(B);CHECK
      • Vars
        • K(g);S_FLIGHT::QAR2(E),XP(f)
      • Refutation
        • R(b);XR(B)
    • Try
      • R(H);
      • Threat
        • QAB1(E),XP(f)
      • Vars
        • K(g);S_FLIGHT,XP(F)::QAR1(E)
        • K(g);S_FLIGHT::QAB(E)
        • P(f);XS(C)::QAR1(E)
      • Refutation
        • R(a);XS(C)
    • Try
      • R(H);CHECK
      • Vars
        • K(g);S_FLIGHT,XP(F)::QAR1(E)
      • Refutation
        • P(j);XR(H)
    • Try
      • R(H);CHECK
      • Refutation
        • S(l);XR(H)
    • Try
      • Q(E);CHECK
      • Refutation
        • P(i);XQ(E)
    • Try
      • Q(E);CHECK
      • Refutation
        • K(g);P-FLIGHT,XQ(E)
  • Actual
    • S(C);
    • Threat
      • QAR1(E)
    • Vars
      • K(g);P-FLIGHT::QAR1(E),XP(f)
      • K(g);S_FLIGHT,XP(F)::QAR2(E)
      • K(g);S_FLIGHT::QAR2(E),XP(f)
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